Math, asked by rajputarvindkumar123, 4 months ago

Find the value of cos(x + y) - cos(x - y).​

Answers

Answered by twinkle385
0

Answer:

 \cos((x + y) - (x - y)) \\  =  \cos((x + y) - x + y)) \\  = cos(2y) \\  = cos2y

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