Class 11th

19. $2Si{n}^2\frac{\pi }{6}+cose{c}^2\frac{7\pi }{6}co{s}^2\frac{\pi }{3}=\frac{3}{2}$

Class 11 Math Trigonometric Functions Exercise 3.3 Solution

18. $si{n}^2\frac{\pi }{6}+co{s}^2\frac{\pi }{3}-ta{n}^2\frac{\pi }{4}=-\frac{1}{2}$

17. $cot\left(-\frac{15\pi }{4}\right)$

16. $sin\left(-\frac{11\pi }{3}\right)$

14. cosec (-1410°)

Find the values of the trigonometric functions in Exercises 13 to 17.

13. sin 765°

12. tan x = –5/12, x lies in second quadrant.

11. sec x = 13/5, x lies in fourth quadrant.

10. cot x = 3/4, x lies in third quadrant.

9. sin x = 3/5, x lies in second quadrant.