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Math 11 Chapter 10
Trigonometric Identities of Sum and Differe
Test - 1
1.
Cot 15
0
= ……………
a)
√
3
– 1 /
√
3
+ 1
b) 1 -
√
3
/ 1 +
√
3
c)
√
3
+ 1 /
√
3
– 1
d) 1 +
√
3
/ 1 -
√
3
2.
Sin(2
p
- x) Cos(
p
- x) / Sin(
p
/ 2 + x)Cos(
p
/2 - x) = _____________.
a) 2
b) 1
c) .5
3.
If cos x = 3/5, then tan(x /2 ) = __________.
a) 1/2
b) 2/1
c) 1
d) 2
4.
Angle (3
p
/ 2
q
) will have terminal ray lies in
a) 3rd quadrant.
b) None of the above.
c) On x -axis
d) 2nd quadrant.
5.
Sin ß = ………………
a) 2sin ß / 2 cos ß/ 2
b) None
c) Sin ß /2 cos ß / 2
d) 2sin ß cos ß
6.
Tan 2x =
a) 2tanx / 1- tan
2
x
b) 2 tan x / tan
2
x
c) 1- tan
2
x / 2 tanx
d) Cos2x / Sin2x
7.
Sin 3x
a) 3 sin x - 2 sin
3
x
b) 3 sin x - 4 sin
2
x
c) 3 sin x - 4 sin
3
x
8.
a) a
b) c
c) b
d) d
9.
Cos (200
0
40/) = ……………….
a) -sin (20
0
40Value
/
)
b) - Cos20
0
40Value
/
c) Cos (20
0
40Value
/
)
d) sin (20
0
40Value
/
)
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