THIS IS A MATH DOUBT PLS ANSWER THIS ASAP,
Prove -
cos (pi/4 - x) cos(pi/4-y) - sin(pi/4-x) sin (pi/4 -y ) = sin (x+y)

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THIS IS A MATH DOUBT PLS ANSWER THIS ASAP,
Prove -
cos (pi/4 - x) cos(pi/4-y) - sin(pi/4-x) sin (pi/4 -y ) = sin (x+y)

Mohan Kumar · Accepted Answer

THIS IS A MATH DOUBT PLS ANSWER THIS ASAP, Prove - cos (pi/4 - x) cos(pi/4-y) - sin(pi/4-x) sin (pi/4 -y ) = sin (x+y)