SOLUTION: SOLUTION:sin(45degrees+x)*sin(45degrees-x)

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Question 952017: SOLUTION:sin(45degrees+x)*sin(45degrees-x)
Answer by jhaashok630(18) About Me  (Show Source):
You can put this solution on YOUR website!
sin(45+x)*sin(45-x)
cosX - cosY = - 2sin[ (X + Y) / 2 ] sin[ (X - Y) / 2 ]
COMPARE : -2sin((90+2x)/2) sin((90-2x)/2)
(cos90-cos2x)/2
Answer : 1/2 cos(2x)