The derivative of $y=\sin ^2\left[\cot ^{-1}\left(\sqrt{\frac{\mathbf{1}-\boldsymbol{x}}{\mathbf{1}+\boldsymbol{x}}}\right)\right]$ is
$\frac{1}{2}$
$\frac{1-x}{2}$
$$ \frac{x}{2} $$
0
An engineering team is testing a new prototype drone. The drone has constant success rate of $\frac{\mathbf{2}}{\mathbf{7}}$ for every autonomous landing attempt. Two engineers, Sarah and Swarna, take turns initiating the landing sequence, with Swarna going first.
If they continue the process until a landing is successful, what is the probability that Sarah is the one who initiates the successful landing?
$\frac{5}{12}$
$\frac{30}{37}$
$\frac{7}{37}$
$\frac{7}{12}$
Let ' $\boldsymbol{a}$ ' and ' $\mathbf{b}$ ' be two numbers where $\boldsymbol{a}<\boldsymbol{b}$. The geometric mean of these numbers exceeds the smaller number by 12 and the arithmetic mean is smaller than the larger number by 24 . Then the value of $|\boldsymbol{b}-\boldsymbol{a}|$ is:
52
44
48
60
$$ \text { The expression } \frac{1-\tan ^2\left(\frac{\pi}{4}-A\right)}{1+\tan ^2\left(\frac{\pi}{4}-A\right)} \text { equals } $$
$\sin A$
$\sin 2 A$
$\cos A$
$\cos 2 A$
COMEDK Papers
All year-wise previous year question papers