Math 11 Chapter 10Trigonometric Identities of Sum and DiffereTest - 5

Math 11 Chapter 10
Trigonometric Identities of Sum and Differe
Test - 5

1. If O is added or subtracted from an even multiple of p/2, the trigonometric ratios shall remain the same.

a) True
b) False

2.

a) b
b) a
c) d
d) c

3. Tan (-β) = ………..

a) - tan β
b) tan β
c) cos β
d) cot β

4. 2cos 65⁰ cos 15⁰ =……..

a) None
b) Cos 50⁰ – cos80⁰
c) Cos80⁰ – cos 50⁰
d) Cos80⁰ +cos50⁰

5. If tanq = 1/2then Cos2q = ______________.

a) 3
b) 3/5
c) 5
d) 5/3

6.

a) b
b) c
c) a
d) d

7. -2 sin x sin y

a) Cos (x+y) - Cos x
b) Cos (x+y) - Cos (y - x)
c) Cos (x+y) - Cos (x - y)

8. Cos84⁰ – cos76⁰ =…………………

a) 2cos80⁰ sin4⁰
b) 2sin80⁰ cos4⁰
c) -2sin80⁰sin4⁰
d) -2sin(80⁰) cos (4⁰)

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