Chapter 5: Problem 47
Perform the addition or subtraction and use the fundamental identities to simplify. There is more than one correct form of each answer. $$\tan x-\frac{\sec ^{2} x}{\tan x}$$
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Chapter 5: Problem 47
Perform the addition or subtraction and use the fundamental identities to simplify. There is more than one correct form of each answer. $$\tan x-\frac{\sec ^{2} x}{\tan x}$$
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Proof (a) Write a proof of the formula for \(\sin (u+v)\) (b) Write a proof of the formula for \(\sin (u-v)\)
Write the expression as the sine, cosine, or tangent of an angle. $$\cos 130^{\circ} \cos 40^{\circ}-\sin 130^{\circ} \sin 40^{\circ}$$
Find the exact value of the trigonometric expression given that \(\sin u=-\frac{7}{25}\) and \(\cos v=-\frac{4}{5} .\) (Both \(u\) and \(v\) are in Quadrant III.) $$\cos (u+v)$$
Prove the identity. $$\cos (\pi-\theta)+\sin \left(\frac{\pi}{2}+\theta\right)=0$$
Use the sum-to-product formulas to rewrite the sum or difference as a product. $$\sin 5 \theta-\sin 3 \theta$$
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