Questions on Trigonometric Identities
Multiple choice questions on trigonometric identities with answers at the bottom of the page.
Questions with Answers
Question 1
Which of the following is not an identity?a) sin 2 a+cos 2 a = 1
b) sin a = tan a * cos a
c) 1 + cot 2 a = csc 2 a
d) 1 - sec 2 a = tan 2 a
Question 2
Which of the following is an identity?a) sin (a) cos (a) = (1/2) sin(2 a)
b) sin a + cos a = 1
c) sin(-a) = sin a
d) tan a = cos a / sin a
Question 3
a) sin t
b) csc t
c) sec t
d) cos t
Question 4
Which of the following is not an identity?a) tan(2 t) = 2 tan (t)
b) sin 2 a = 1 - cos 2 a
c) sin(-t) = - sin(t)
d) sec(-t) = sec(t)
Question 5
Which of the following is an identity?a) sin 2 u = 1 + cos 2 u
b) cot u = sin u * cos u
c) sin 2 u = 1 - 1 / sec 2 u
d) cos(-u) = - cos u
Question 6
a) -sin(x)
b) sin (x)
c) sec (x)
d) cos (x)
Answers
- d)
- a)
- b)
- a)
- c)
- a)