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Determino the genoral Solution of the following. 1. \( \sin 2 \theta=\sin (\theta-30) \) 2. \( \cos (x-10)=\cos (2 x+15) \) 3. \( \tan 3 \theta=\tan (2 \theta+45) \) 4. \( \sin \left(2 \theta+60^{\circ}\right)=-\sin \theta \) 5. \( \cos 4 x=\cos \left(2 x-30^{\circ}\right) \)

Ask by Ruiz Fuentes. in South Africa
Mar 14,2025

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Here are the general solutions for each equation: 1. \( \theta = -\frac{\pi}{2}k - 30 \) 2. \( x = -2k\pi - 25 \) 3. \( \theta = k\pi + 45 \) 4. \( \theta = k\pi - \frac{121}{2} \) 5. \( x = k\pi - 15 \) where \( k \) is any integer.

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Mind Expander

Let's explore some interesting aspects of solving trigonometric equations! In ancient Greece, mathematicians like Pythagoras and Hipparchus laid the groundwork for trigonometry, developing concepts surrounding angles and their relationships. They used these tools not just for mathematics, but also for astronomy and navigation! Understanding the periodic nature of trig functions would come centuries later, but their contributions set the stage for solving equations like the ones you provided. Trigonometric equations often pop up in real-life situations such as engineering, physics, and even sound waves! For instance, when designing bridges, engineers apply trigonometric concepts to calculate forces, load distributions, and angles. Recognizing patterns in these equations can help simplify complex problems, ensuring that structures are safe and efficient. So, whether you're calculating angles or analyzing wave patterns, trigonometric knowledge is key in various fields!

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