Question

sin^2 theta = 4-2cos^2theta

Solve.

Answer 1

\[sin^2\theta = 1-\cos^2\theta \] use this as a substitution for the left hand side of this equation, then you will obtain an easier equation.

Answer 2

yeah I got that far, then what….

Answer 3

\[cos^2\theta=3 \]
\[cos \theta = \sqrt{3}\]

you could take the inverse function of that, but we know already that there is no solution for that because it's only defined between values of -1 and 1

Answer 4

OKAY Thank youuuu

Answer 5

you're welcome