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Math 11 Chapter 10
Trigonometric Identities of Sum and Differe
Test - 3
1.
Cos P - Cos Q=-2 Sin P+Q/2+Sin P-Q/2
a) False
b) True
2.
(Sin θ/ 2 – cos θ / 2)
2
=……………..
a) 1 – sin2 θ
b) 1 - sin θ
c) 1 + sin2 θ
d) 1 + sin θ
3.
If sin x/2 = 4/5 then cos x/2 =
a) -3/5
b) None of the above.
c) 3/5
d) + 3/5
4.
Sin
p
/ Sec4x + Cosx / Cosec4x =
a) Sin 5 x
b) Cos 5x
c) Sec 5x.
d) tan 5 x
5.
2 Sin7
q
Cos3
q
a) Sin10
q
+ Sin 2
q
b) Sin10
q
+ Sin 4
q
c) Sin10
q
+ Sin 6
q
6.
Cos 2α = …………..
a) 2cos
2
α – 1
b) 2sin
2
α-1
c) 1 + 2sin
2
α
d) 2cos
2
α + 1
7.
Distance between points (3, 8) and (5, 6) is
a) -
Ö
8
b) -8
c) 8
d)
Ö
8
8.
Cos
2
15
0
– sin
2
15
0
=…………………..
a) Cos
4
30
0
b) ½
c) Cos
2
15
0
d)
√
3/2
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