Question

(3) (sec A + tan A) (1 - sin A)
(A) sec A (B) sin A (C) cosec A (D) cos A​

Answer 1

Answer:

( D) cos A

Step-by-step explanation:

(sec A + tan A) (1 - sin A)

= (1/cosA + sinA/cosA) (1 - sinA)

= (1+sinA)/cosA (1-sinA)

= (1^2 - sin^2A)/cosA

= (1 - sin^2A)/cosA

= cos^2A/cosA

= cos A

answer is. (D)