Math, asked by Dev0619, 3 months ago

(sec a + tan a) (1 - sin a) = cos a​

Answers

Answered by khanshahnawaz915805
0

Answer:

(secA+tanA)(1−sinA)

=(

cosA

1

+

cosA

sinA

)(1−sinA)

=(

cosA

1+sinA

)(1−sinA)

=

cosA

(1+sinA)(1−sinA)

=

=

cosA

(1−sin

2

A)

=

cosA

cos

2

A

=cosA

∴(secA+tanA)(1−sinA)=cosA

Hence, the answer is cosA.

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