Math, asked by dipaktapadar2017, 1 year ago

Sec A -1/Sec A -1=(sin A/1+cos A)^2

Answers

Answered by sandy1816

2

Step-by-step explanation:

(sinA/1+cosA)²

=sin²A/(1+cosA)²

=(1-cos²A)/(1+cosA)²

=1-cosA/1+cosA

=secA-1/secA+1

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