Trigonometric Equations · Mathematics · TS EAMCET

The solution set of the equation $\cos ^2 2 x+\sin ^2 3 x=1$ i

If the period of the function $f(x)=2 \cos (3 x+4)-3 \tan (2 x-3)+5 \sin (5 x)-7$ is $k$, then

The number of solutions of the equation $\sin 7 \theta-\sin 3 \theta=\sin 4 \theta$ that lie in the interval $(0, \pi)$, is