Question

13. If 2 sin^2 thetha - cos ^2 thetha =2 then find the value of thetha.​

Answer 1

Answer:

$2 { \sin^{2}x } - { \cos }^{2} x = 2$

$2 { \sin }^{2} x + 1 - 1 - { \cos }^{2}x = 2$

$3 {sin}^{2}x = 3$

$\sin(x) = 1$

$x = 90$