Math, asked by ns947585, 11 hours ago

(ü) COS A 1 + sin A + = 2 sec A 1 + sin A COS A​

Answers

Answered by subgamer00
1

Answer:

cosA

+

cosA

1+sinA

=2secA

LHS

1+sinA

cosA

+

cosA

1+sinA

=

cosA(1+sinA)

cos

2

A+(1+sinA)

2

=

cosA(1+sinA)

cos

2

A+1+sin

2

A+2sinA

=

cosA(1+sinA)

cos

2

A+sin

2

A+1+2sinA

=

cosA(1+sinA)

1+1+2sinA

=

cosA(1+sinA)

2+2sinA

=

cosA(1+sinA)

2(1+sinA)

=2secA

R.H.S.

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