Question

If cos²3x = 1/4, then value of x is?​

Answer 1

Answer:

Multiply both sides by x (check that x is not equal to 0 at the end as it would make the 1/x undefined) x^2 ... If X+1/x = 3 then what is the value of x²+1/x² =?.

Missing: cos²3x = ‎| Must include: cos²3x =