English, asked by truptisanj, 3 months ago

Prove that (sec A-tan A)(1+ sin A)= 1-sin A​

Answers

Answered by manas9809
1

Answer:

L.H.S=secA(1−sinA)(secA+tanA)=(secA−

cosA

sinA

)(secA+tanA)

=(secA−tanA)(secA+tanA)

=sec

2

A−tan

2

A

Putting if tan

2

A+1=sec

2

A−

we get L.H.S=1+tan

2

A−tan

2

A=1

⇒L.H.S=R.H.S

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