Yefim S. answered • 04/24/24
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A) cos8ucos(-2u) = cos8ucos2u = 0.5(cos10u + cos6u).
B) sin3t - sin5t = 2sin(-t)cos4t = - 2sintcos4t
Johnathan P.
asked • 04/24/24trigonometry question
Express as a sum or difference. (Use the Product-to-Sum formulas.)
A) cos 8u cos(−2u)
B) sin 3t − sin 5t
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