Question

If 1/√(1+tan2
A) = x, then value of x is

Answer 1

Answer:

x=cosA

Step-by-step explanation:

we know that

1+tan2A =sec2A

(hear 2 is squat)

sec2A =1+tan2A

1/cos2A =1+tan2A. (secA =1/cosA )

cos2A =1/tan2A

cosA =1/√tan2A

so, x=cosA