Math, asked by maximus1118, 7 months ago

cos(3pie/4+x)-cos(3pie/4-x) = -root2sinx

Answers

Answered by sp0408159

3

cos(3pie/4+x)-(3pie/4-x)

=cos3pie/4 cosx - sin3pie/4 sinx-cos3pie/4 cosx - sin3pie/4 sinx

= - 2 sin3pie/4 sinx

= - 2 (-2sin pie/4) sinx

= in root 2sinx

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