Math, asked by keerthi3821, 1 year ago

cosA-sinA+1/cos A +sinA = cosecA+cotA

Answers

Answered by Anonymous

Lets take the LHS =

(cosA-sinA)+1/(cosA+sinA)-1

taking conjugate

(cosA-sinA)+1/(cosA+sinA)-1 × (cosA+sinA)+1/(cosA+sinA)+1

multiplying we get

=cos2A-sin2A+2cosA+1/2sinAcosA

=cos2A-sin2A+2cosA+sin2A+cos2A/2sinAcosA

on solving we get

=2cos2A+2cosA/2sinAcosA

=cosA+cos2A/sinAcosA

we can alsom write in the form of

cosA/sinAcosA +cos2A/sinAcosA

on solving we get

CosecA+cotA =R.H.S

I hope it helps you ^_^

Answered by Anonymous

Lets take the LHS =

(cosA-sinA)+1/(cosA+sinA)-1

taking conjugate

(cosA-sinA)+1/(cosA+sinA)-1 × (cosA+sinA)+1/(cosA+sinA)+1

multiplying we get

=cos2A-sin2A+2cosA+1/2sinAcosA

=cos2A-sin2A+2cosA+sin2A+cos2A/2sinAcosA

on solving we get

=2cos2A+2cosA/2sinAcosA

=cosA+cos2A/sinAcosA

we can alsom write in the form of

cosA/sinAcosA +cos2A/sinAcosA

on solving we get

CosecA+cotA =R.H.S

I hope it helps you ^_^

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