R. D. Sharma Solutions for Chapter: Trigonometric Identities, Exercise 4: MULTIPLE CHOICE QUESTIONS (MCQs)

If $\sec \theta +\tan \theta =x,$ then $\sec \theta =$

$\left(\sec A+\tan A\right)\left(1-\sin A\right)=$

$\frac{1+{\tan }^{2}A}{1+{\cot }^{2}A}$ is equal to

If $\sin \theta -\cos \theta =0,$ then the value of ${\sin }^4\theta +{\cos }^4\theta$ is

The value of $\sin \left(45°+\theta \right)-\cos \left(45°-\theta \right)$ is equal to

If $∆ABC$ is right-angled at $C,$ then the value of $\cos \left(A+B\right)$ is

If $\cos 8\theta =\sin \theta$ and $8\theta <90°$, then the value of $\tan 6\theta$ is

If $\cos \left(\alpha +\beta \right)=0,$ then $\sin \left(\alpha -\beta \right)$ can be reduced to