\( 1 \frac{\sin x}{\cos x \cdot \tan x} \) 2) \( \tan ^{2} x\left(1-\sin ^{2} x\right) \) \% \( \frac{\left(1-\cos ^{2} x\right)}{\sin x} \) \( 48 \sin ^{2} \theta+8 \cos ^{2} \theta \) 3 \( 1-\tan x \cdot \cos x \cdot \sin x \) \( 7 \frac{1}{\sin x}-\frac{\cos x}{\tan x} \) \( 6 \quad(3-3 \sin \theta)(3+3 \sin \theta) \) \( 8\left(\frac{1}{\tan x}+\tan x\right)(\sin x \cdot \cos x) \) 9) \( \frac{\sin x \cdot \cos x}{1+\cos ^{2} x-\sin ^{2} x} \) \( 10 \tan ^{2} x-\frac{1}{\cos ^{2} x} \)
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The Deep Dive
Have you ever wondered how these trigonometric expressions are actually tied to the real world? From architecture to engineering, trigonometric functions are foundational in calculating angles and dimensions. For instance, architects use the properties of sine and cosine to determine the pitch of roofs and the height of buildings, making sure they stand tall and strong! Now, if you're diving into these equations, one common pitfall is forgetting to simplify your trigonometric identities. Many folks might overlook that \( \tan x \) can be expressed as \( \frac{\sin x}{\cos x} \) and fail to use it effectively. Remember to apply identities like \( \sin^2 x + \cos^2 x = 1 \) to simplify complex expressions and reduce the chances of mistakes!