Question

If tan teta = 1/√3, then the value of cos 2 teta =​

Answer 1

Answer:

theta = 30° because tan 30°=1/√3

and cos 2 theta = cos 2(30°) = cos 60° = 1/2

Answer 2

Step-by-step explanation:

tan Φ = 1/ √3

tan Φ = tan 30°

Φ = 30°

cos 2Φ = cos 2 × 30° = cos 60° = 1/2