Chapter 5: Problem 100
Use a graphing utility to graph \(y_{1}\) and \(y_{2}\) in the same viewing window. Use the graphs to determine whether \(y_{1}=y_{2}\) Explain your reasoning. $$y_{1}=\sin (x+4), \quad y_{2}=\sin x+\sin 4$$
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Chapter 5: Problem 100
Use a graphing utility to graph \(y_{1}\) and \(y_{2}\) in the same viewing window. Use the graphs to determine whether \(y_{1}=y_{2}\) Explain your reasoning. $$y_{1}=\sin (x+4), \quad y_{2}=\sin x+\sin 4$$
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Find the exact value of the expression. $$\frac{\tan 25^{\circ}+\tan 110^{\circ}}{1-\tan 25^{\circ} \tan 110^{\circ}}$4
Use the sum-to-product formulas to find the exact value of the expression. $$\sin \frac{5 \pi}{4}-\sin \frac{3 \pi}{4}$$
Use the product-to-sum formulas to rewrite the product as a sum or difference. $$\sin 5 \theta \sin 3 \theta$$
Prove the identity. $$\sin \left(\frac{\pi}{2}-x\right)=\cos x$$
Use the power-reducing formulas to rewrite the expression in terms of the first power of the cosine. $$\tan ^{2} 2 x \cos ^{4} 2 x$$
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