Question

(2sin theta -1 )(2sin theta+1) find the value of theta

Answer 1

$(2 \sin(x) - 1)(2 \sin(x) + 1)$
$(2 \sin(x)) {}^{2} - 1$
$4 \sin(x) {}^{2} - 1$
$\sin(x ){}^{2} = \frac{1}{4}$
$\sin(x) = \frac{1}{ \sqrt{2} }$
We know that sin(x) can be equal to $\frac{1}{\sqrt{2}}$ when x = 45.
Therefore, Theta = 45

Answer 2

Theta =45
I HOPE THAT IT HELPS YOU

Sorry for not giving whole ans