Two coins are tossed simultaneously. The probability of getting one head is

In a parallelogram $ABCD$, The bisectors of $\angle A$ and $\angle B$ meet at $O$. Then, the value of $\angle AOB$ is:

The length of the longest rod that can be placed in a room $12 \mathrm{m}$ long, $9 \mathrm{m}$ broad  and $8 \mathrm{m}$ high is:

If $\mathrm{cotA}=\frac{1}{\left(\sqrt{2}-1\right)}$, then the value of $\sin A.\cos A$ is

The perimeter of an equilateral triangle whose area is $4\sqrt{3} {\mathrm{cm}}^2$ is:

If $\sin B=\frac{1}{2}$, then $3\cos B-4{\cos }^{3}B$ is equal to: