Question

3 tan squared theta minus 1 equals to zero find cos 2 theta given that theta is acute​

Answer 1

Answer:

3 tan^2 theta - 1= 0

or, tan^2 theta= 1/3

or, tan theta= 1/√3= tan 30°

so, theta = 30°......

so, cos 2 theta= cos 60° = 1/2...

..

If it helps you, please mark it as a brain list.....

It is very urgent...... Please