Grade 11Trigonometry
prove that cos^x+cos^2(x+y)-2cosx.cosy.cos(x+y)=sin^2y
prove that cos^x+cos^2(x+y)-2cosx.cosy.cos(x+y)=sin^2y
1 Answer
Saurabh Koranglekar
Dear student
Please consider x= 90 and y = 0
LHS != RHS
Please check and upload the complete question in correct notation
Regards
Please consider x= 90 and y = 0
LHS != RHS
Please check and upload the complete question in correct notation
Regards
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