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Math 11 Chapter 10
Trigonometric Identities of Sum and Differe
Test - 4
1.
If Sin x = 1/3 then Sin 3 x = ______________.
a) 27/3
b) 27
c) 23
d) 23/27
2.
Sin θ/2 = …………………………….
a)
√
± 1-cosθ/1+cosθ
b)
√
± 1-cosθ/2
c)
√
± 1+cos/2
d) None
3.
Cos (α+β) = …………
a) Sin α cos β – cos α sin β
b) Sin α cos β + cos α sin β
c) cos α cos β + sin α sin β
d) Cos α cos β – sin α sin β
4.
2 Sin3
q
Cos
q
= Sin3
q
+ Sin 2
q
a) True
b) False
5.
Sin (
p
/2 - x) = sin x.
a) True
b) False
6.
If an angle is greater than 3
p
/2 and less than 2
p
, its terminal ray lies in
a) y-axis.
b) 4th quadrant
c) x- axis
d) 3rd quadrant
7.
Tan (2
p
+
q
) = - tan
q
a) True
b) False
8.
Sec (-300
o
) =
a) 1 /2
b) 2
c) Cos 60
o
d) Sin 60
o
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