Math, asked by ankisingh288, 1 year ago

If cosA - sinA=1,prove that cosA + sinA=+-1.

Answers

Answered by vanshaj45

0

LHS = RHS

HENCE PROVED

Answered by mgyittonelayma

0

(CosA-sinA)^2=1

Cos^2A-2cosASinA+sin^2A=1

1-sin2A=1

Sin2A=2

2SinAcosA=2

SinACosA=1

SinA=1/cosA

SinA+CosA=1/cos^2A+cosA

=1+cos^A/cos^A

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