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prove that sin^2x =1-tan^2x/1+tan^2x

prove that sin^2x =1-tan^2x/1+tan^2x
Grade:11

1 Answers

AJIT AskiitiansExpert-IITD
68 Points
11 years ago

Dear swarnim ,

sin2x = cos2x - sin2x

           = ( cos2x - sin2x) *cos2x/cos2x

             =   1- tan2x/sec2x

              = 1-tan2x/ 1 +tan2x

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