A P Prabhakaran Solutions for Chapter: Trigonometric Functions, Exercise 3: OBJECTIVE TYPE QUESTIONS

If $x= \tan \theta ,$ then $\frac{1-x^2}{1+x^2}$ is equal to

$\tan 5^{°}+\tan {15}^{°}+\tan {25}^{°}+...+\tan {355}^{°}$ is equal to

If $x \cos 45° {\sin }^{2}30°=\frac{{\cot }^{2}30° \sec 60°}{\mathrm{cosec}45° {\tan }^{2}60°}$, then $x$ is equal to

If $x\in (0, \frac{\mathrm{\pi }}{2}),$ then $\sin 5x+\sin 3x+\sin x=0$ is true for

The angles of a triangle are in A.P. and the greatest angle is $105°$, then the least angle in radians is

$\sin 20° (\tan 10°+\cot 10°)$ is

If $\cos (A-B)=-1,$ then $\sin A+\sin B$ is equal to

The value of $\tan 70°-\tan 10°-\sqrt{3} \tan 70° \tan 10°$ is equal to