Math, asked by makwananeeta175, 8 months ago

2
1+ 2 cos A
sin? a.
1+ 3 cot2 a

Answers

Answered by swapnilsarje17

0

Answer:

To prove: 1+3cot2A1+2cos2A=sin2A

Consider

1+3cot2A1+2cos2A

=1+3sin2Acos2A1+2cos2A

=sin2A(sin2A+3cos2A1+2cos2A)

=sin2A(1−cos2A+3cos2A1+2cos2A)

=sin2A(1+2cos2A1+2cos2A)

=sin2A

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