$$ \frac { \sin 20 \alpha + \sin 14 \alpha + \sin 8 \alpha + \sin 2 \alpha } { \cos 2 \alpha + \cos 14 \alpha + \cos 8 \alpha + \cos 2 \alpha } = an 11 $$

Question

$$ \frac { \sin 20 \alpha + \sin 14 \alpha + \sin 8 \alpha + \sin 2 \alpha } { \cos 2 \alpha + \cos 14 \alpha + \cos 8 \alpha + \cos 2 \alpha } = 	an 11 $$

UpStudy AI · Accepted Answer

To solve the equation

$$
\frac { \sin 20 \alpha + \sin 14 \alpha + \sin 8 \alpha + \sin 2 \alpha } { \cos 2 \alpha + \cos 14 \alpha + \cos 8 \alpha + \cos 2 \alpha } = \tan 11,
$$

we will first simplify the left-hand side.

### Step 1: Combine the Sine Terms
We can use the sine addition formulas to combine the sine terms. The sine addition formula states that:

$$
\sin A + \sin B = 2 \sin\left(\frac{A+B}{2}\right) \cos\left(\frac{A-B}{2}\right).
$$

### Step 2: Combine the Cosine Terms
Similarly, we can use the cosine addition formulas to combine the cosine terms. The cosine addition formula states that:

$$
\cos A + \cos B = 2 \cos\left(\frac{A+B}{2}\right) \cos\left(\frac{A-B}{2}\right).
$$

### Step 3: Apply the Formulas
Let's apply these formulas to the sine and cosine terms.

1. For the sine terms:
   - Combine $$ \sin 20\alpha + \sin 2\alpha $$
   - Combine $$ \sin 14\alpha + \sin 8\alpha $$

2. For the cosine terms:
   - Combine $$ \cos 14\alpha + \cos 2\alpha $$
   - Combine $$ \cos 8\alpha + \cos 2\alpha $$

### Step 4: Set Up the Equation
After combining, we will set up the equation and simplify it to find $$ \alpha $$.

Let's perform these calculations.
Simplify the expression by following steps:
- step0: Solution:
  $$\cos\left(2alpha\right)+\cos\left(14alpha\right)+\cos\left(8alpha\right)+\cos\left(2alpha\right)$$
- step1: Multiply the terms:
  $$\cos\left(2a^{2}lph\right)+\cos\left(14alpha\right)+\cos\left(8alpha\right)+\cos\left(2alpha\right)$$
- step2: Multiply the terms:
  $$\cos\left(2a^{2}lph\right)+\cos\left(14a^{2}lph\right)+\cos\left(8alpha\right)+\cos\left(2alpha\right)$$
- step3: Multiply the terms:
  $$\cos\left(2a^{2}lph\right)+\cos\left(14a^{2}lph\right)+\cos\left(8a^{2}lph\right)+\cos\left(2alpha\right)$$
- step4: Multiply the terms:
  $$\cos\left(2a^{2}lph\right)+\cos\left(14a^{2}lph\right)+\cos\left(8a^{2}lph\right)+\cos\left(2a^{2}lph\right)$$
- step5: Transform the expression:
  $$\cos\left(2a^{2}lph\right)+2\cos\left(11a^{2}lph\right)\cos\left(3a^{2}lph\right)+\cos\left(2a^{2}lph\right)$$
- step6: Add the terms:
  $$2\cos\left(2a^{2}lph\right)+2\cos\left(11a^{2}lph\right)\cos\left(3a^{2}lph\right)$$
- step7: Transform the expression:
  $$2\cos\left(2a^{2}lph\right)+2\cos\left(3a^{2}lph\right)\cos\left(11a^{2}lph\right)$$
- step8: Rewrite the expression:
  $$2\cos\left(2a^{2}lph\right)+\cos\left(14a^{2}lph\right)+\cos\left(8a^{2}lph\right)$$
Calculate or simplify the expression $$ \sin(20*alpha) + \sin(14*alpha) + \sin(8*alpha) + \sin(2*alpha) $$.
Simplify the expression by following steps:
- step0: Solution:
  $$\sin\left(20alpha\right)+\sin\left(14alpha\right)+\sin\left(8alpha\right)+\sin\left(2alpha\right)$$
- step1: Multiply the terms:
  $$\sin\left(20a^{2}lph\right)+\sin\left(14alpha\right)+\sin\left(8alpha\right)+\sin\left(2alpha\right)$$
- step2: Multiply the terms:
  $$\sin\left(20a^{2}lph\right)+\sin\left(14a^{2}lph\right)+\sin\left(8alpha\right)+\sin\left(2alpha\right)$$
- step3: Multiply the terms:
  $$\sin\left(20a^{2}lph\right)+\sin\left(14a^{2}lph\right)+\sin\left(8a^{2}lph\right)+\sin\left(2alpha\right)$$
- step4: Multiply the terms:
  $$\sin\left(20a^{2}lph\right)+\sin\left(14a^{2}lph\right)+\sin\left(8a^{2}lph\right)+\sin\left(2a^{2}lph\right)$$
- step5: Transform the expression:
  $$2\sin\left(17a^{2}lph\right)\cos\left(3a^{2}lph\right)+\sin\left(8a^{2}lph\right)+\sin\left(2a^{2}lph\right)$$
- step6: Transform the expression:
  $$2\sin\left(17a^{2}lph\right)\cos\left(3a^{2}lph\right)+2\sin\left(5a^{2}lph\right)\cos\left(3a^{2}lph\right)$$
The results of the calculations are as follows:

1. The sine terms combine to:
   $$
   2\sin(17\alpha)\cos(3\alpha) + 2\sin(5\alpha)\cos(3\alpha)
   $$

2. The cosine terms combine to:
   $$
   2\cos(2\alpha) + \cos(14\alpha) + \cos(8\alpha)
   $$

### Step 5: Substitute Back into the Equation
Now we can substitute these results back into the original equation:

$$
\frac{2\sin(17\alpha)\cos(3\alpha) + 2\sin(5\alpha)\cos(3\alpha)}{2\cos(2\alpha) + \cos(14\alpha) + \cos(8\alpha)} = \tan(11)
$$

### Step 6: Simplify Further
We can factor out common terms in the numerator and denominator if possible. Let's simplify this expression further.

The numerator can be factored as:
$$
2\cos(3\alpha)(\sin(17\alpha) + \sin(5\alpha))
$$

Now, we need to simplify the denominator and see if we can express it in terms of sine or cosine functions.

Let's perform the simplification of the denominator.
Simplify the expression by following steps:
- step0: Solution:
  $$2\cos\left(2alpha\right)+\cos\left(14alpha\right)+\cos\left(8alpha\right)$$
- step1: Multiply the terms:
  $$2\cos\left(2a^{2}lph\right)+\cos\left(14alpha\right)+\cos\left(8alpha\right)$$
- step2: Multiply the terms:
  $$2\cos\left(2a^{2}lph\right)+\cos\left(14a^{2}lph\right)+\cos\left(8alpha\right)$$
- step3: Multiply the terms:
  $$2\cos\left(2a^{2}lph\right)+\cos\left(14a^{2}lph\right)+\cos\left(8a^{2}lph\right)$$
The denominator remains as:

$$
2\cos(2\alpha) + \cos(14\alpha) + \cos(8\alpha)
$$

### Step 7: Set Up the Final Equation
Now we can rewrite the equation as:

$$
\frac{2\cos(3\alpha)(\sin(17\alpha) + \sin(5\alpha))}{2\cos(2\alpha) + \cos(14\alpha) + \cos(8\alpha)} = \tan(11)
$$

### Step 8: Solve for $$ \alpha $$
To solve for $$ \alpha $$, we can cross-multiply:

$$
2\cos(3\alpha)(\sin(17\alpha) + \sin(5\alpha)) = \tan(11) \cdot (2\cos(2\alpha) + \cos(14\alpha) + \cos(8\alpha))
$$

This equation can be complex to solve analytically, so we may need to use numerical methods or graphing techniques to find the value of $$ \alpha $$.

Would you like to proceed with a numerical solution for $$ \alpha $$?
To solve the equation $$ \frac{ \sin 20\alpha + \sin 14\alpha + \sin 8\alpha + \sin 2\alpha }{ \cos 2\alpha + \cos 14\alpha + \cos 8\alpha + \cos 2\alpha } = \tan 11, $$ we can simplify the left-hand side using trigonometric identities. After combining like terms and simplifying, the equation reduces to: $$ \frac{2\cos(3\alpha)(\sin(17\alpha) + \sin(5\alpha))}{2\cos(2\alpha) + \cos(14\alpha) + \cos(8\alpha)} = \tan 11. $$ Solving this equation for $$ \alpha $$ may require numerical methods or graphing techniques due to its complexity.

Upstudy AI Solution

Answer

Solution

Step 1: Combine the Sine Terms

Step 2: Combine the Cosine Terms

Step 3: Apply the Formulas

Step 4: Set Up the Equation

Step 5: Substitute Back into the Equation

Step 6: Simplify Further

Step 7: Set Up the Final Equation

Step 8: Solve for

The Deep Dive

Step 1: Simplify The Numerator

Step 2: Simplify The Denominator

Step 3: Putting it Together

Step 4: Finding The Solutions

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