Question

(secA + tan A )(1- sin A)​

Answer 1

correct answer is cos a

Step-by-step explanation:

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

1. (1/cos a + sin a/cos a)(1-sin a)
2. (1+sin a/cos a)(1- sin a)
3. (1-sina²)/cos a
4. cos a²/ cos a
5. cosa

Answer 2

(1/cos A + sin A / cos A)(1-sin A)
=1/cos A(1+sin A)(1-sin A)
=1/cos A(1- sin^2 A)
=1/ cos A(cos ^2 A)
=Cos A
Hence cos A is answer