M L Aggarwal Solutions for Chapter: Introduction to Trigonometry, Exercise 3: Objective Questions

If $\sin A=\frac{1}{2},$then the value of $cot A$ is        

If $\cos ec \theta =\frac{13}{12},$then the value of $\tan \theta$ is     

    If $\tan A=\frac{x}{y}$, then $\cos A$ is equal to 

The value of $\frac{2\tan 30°}{1-{\tan }^{2}30°}$ is equal to 

If $\sin \alpha =\frac{1}{2}$ and $\cos \beta =\frac{1}{2}$, then the value of $(\alpha +\beta )$ is 

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

In the figure given below, $ABC$ is a right triangle right-angled at $B$. If $\mathrm{AB}=10 \mathrm{cm}$ and $\angle C=30°$, then the length of the side $BC$ is

In the figure given below, $\mathrm{PQR}$ is a right triangle right-angled at $Q$. If $PQ=4 \mathrm{cm}$ and $PR=8 \mathrm{cm}$ then $\angle P$ is equal to