Question

(sec A + tan A) (1 - sin A) =​

Answer 1

Answer:

first multiply and expand the expression.

while expanding use sec A as 1/cos A as sec A=1/cos A

tan A=sin A / cos A

on expanding you will get the terms as .

1/cos A  -  sin A/cos A + sin A/cos A - sin^2 A/cos A

1/cos A  - sin^2 A/cos A

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

cos^2 A/cos A = cos A

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