Math, asked by sagardeepudayasingh, 3 months ago

(b) Prove that :
cosA + tan2 A-1
sin- A
tan? A.
11

Answers

Answered by Anonymous

1

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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