Math, asked by albertgates, 11 months ago

cosa cos(y-a) - sin a sin(y -a)= cos y

Answers

Answered by shiwamvishwakarma

6

Explanation /_____/

FORMULA = cos (x+y)= cos x cos y - sinx sin y

L.H.S

cos a cos (y-a) -sin a sin (y-a)

cos (a+y-a)

cos y =R.H.S

hope it's help you

Thank you ☺☺☺

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