Chapter 3 – Trigonometric Functions (Ex – 3.2)

Trigonometric Functions (Ex – 3.2)

Find the values of other five trigonometric functions in Exercises 1 to 5.

Question 1.
cos x = -1/2, x lies in third quadrant.

Solution.

 Question 2.
sin x = 3/5, x lies in second quadrant.

Solution.

Question 3.
cot x = 3/4, xlies in third quadrant.

Solution.

Question 4.
sec x = 13/5, x lies in fourth quadrant.

Solution.

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

Solution.

tan x = – 5/12
cot x = 1/tanx = 1/(−5/12) = −12/5
1 + tan² x = sec² x

Find the values of the trigonometric functions in Exercises 6 to 10.

Question 6.
sin 765°

Solution.

Question 7.
cosec (-1410°)

Solution.

 Question 8.
tan(19π/3)

Solution.

Question 9.
sin(-11π/3)

Solution.

Question 10.
cot(-15π/4)

Solution.