71)

If \(sec A = {5\over4}\) , then the value of \(\rm \frac{\tan A}{1 + \tan^2A} - \frac{\sin A}{\sec A}\)is:

SSC CGL 2022

A)

0

B)

1

C)

2

D)

3

72)

If \(cos θ + cos^2θ =1\), find the value of \(​​​​​​​\sqrt{\sin^4θ + \cos^2θ}\)

SSC CGL 2022

A)

\(\sqrt{2}cos θ \)

B)

\(\sqrt{2} sin θ\)

C)

2cos θ 

D)

2sin θ

73)

If sin A = 4/5, then what is the value of sin2 A?

SSC CGL 2022

A)

48/25

B)

36/25

C)

26/25

D)

16/25