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Dewight is proving the sum formula for the sine function. He has started his proof, what property should he use to complete the next line?

Dewight is proving the sum formula for the sine function He has started his proof what property should he use to complete the next line class=

Respuesta :

sqdancefan

Answer:

C) the difference identity for the cosine function

Step-by-step explanation:

The last line showing shows the cosine of the difference of two angles. The difference identity for the cosine function would seem to be indicated.