Question

please solve this question​

Answer 1

Answer:

Step-by-step explanation:

sin²β + cos²β = 1

$sec\beta =\frac{1}{cos\beta }$

~~~~~~~~~~

secβ√(1 - sin²β) = secβ√cos²β = secβ × cosβ = 1

Answer 2

Step-by-step explanation:

L.H.S = sec 0

$\sqrt{cos \: square \: 0}$

= sec 0 * cos 0

= 1/cos 0 * cos 0

=. 1 = R.H.S