Embibe Experts Solutions for Exercise 1: EXERCISE 3.1

If $\tan \theta =\frac{-4}{3}$ then $\sin \theta$ is equal to

$\sin \left(\frac{\pi }{2}+\theta \right)\cos \left(\frac{3\pi }{2}+\theta \right)\tan \left(\frac{5\pi }{2}+\theta \right)\cot \left(\frac{7\pi }{2}+\theta \right)$ is equal to

$\sin \left(\frac{17\pi }{3}\right)$ is equal to

Which of the following is positive number?

$\cos 45°·\cos 46°·\cos 47°....\cos 135°=$

Find $\sin \theta +\sin \left(\pi +\theta \right)+\sin \left(2\pi +\theta \right)+\sin \left(3\pi +\theta \right)+....$ upto $2021$ term.

Find $\cos \left(\frac{\pi }{2}+\theta \right)+\cos \left(\frac{3\pi }{2}+\theta \right)+\cos \left(\frac{5\pi }{2}+\theta \right)+\cos \left(\frac{7\pi }{2}+\theta \right).....$ upto $2021$ terms.

Find value of $\sec \left(1140°\right)+cosec\left(1140°\right)+\sin \left(1140°\right)+\tan \left(1140°\right)+\cot \left(1140°\right)+\cos \left(1140°\right)$.