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OpenStudy (anonymous):
I need help with this question. Rewrite the expression as a trigonometric function of a single angle measure. cos5xcosx +sin5xsinx
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OpenStudy (vishweshshrimali5):
Okay see I have a formula: \(\large{\sin{(A+B)} = \sin{A}\cos{B} + cos{A}\sin{B}}\) Can you use this formula here ?
OpenStudy (vishweshshrimali5):
Here, A = 5x and B = x
OpenStudy (vishweshshrimali5):
@jhhj are you there ?
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