Question

if sec=1/rootof 5 , then cos is​

Answer 1

Answer:

√5

Step-by-step explanation:

bcoz sec is inverse of cos

Answer 2

$sec = \frac{1}{ \sqrt{5} } \\ cos = \frac{1}{sec} = \frac{1}{ \frac{1}{ \sqrt{5} } } = \sqrt{5}$