Matthew B.

asked • 02/11/21

write the given sum as a product. You may need to use an Even/Odd or Cofunction Identity. sin(2θ) − sin(7θ)

i have the answer it is -2Cos(9/2θ) Sin(5/2θ) i just dont know how to show my work any help would be awsome. thx alot

Dayv O.

and it works out that when c<d then c-d is negative, your answer moved the negative from the sin function variable to a multiplication by -1 : in the formula, the answer is is 2*cos((9/2)θ)*sin((-5/2)θ), which because sin(-j)=-sin(j) matches your answer


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