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Math 11 Chapter 9
Fundamentals of Trigonometry
Test - 10
1.
Sin (-1980
0
) = ….
a) ∞
b) 0 (Zero)
c) + 1
d) - 1
2.
Tan (-990
0
) = …………….
a) + 1
b) - ∞
c) - 1
d) ∞
3.
Cos (-305
0
) = …………..
a) Sin 35
0
b) Cos 50
0
c) Sin 55
0
d) Cos 35
0
4.
Cos 30
0
Cos 60
0
+ sin30
0
sin60
0
= ……………
a) ½
b) -
√
3
/2
c)
√
3
/2
d) - ½
5.
Cos90
0
– c0s30
0
= ……………….
a) - 2sin60
0
sin30
0
b) - 2sin60
0
cos30
0
c) 2sin60
0
Sin30
0
d) None
6.
Cos (-15Π) = ………….
a) None
b) + 1
c) 0
d) - 1
7.
Sin (-1980
0
) = ……….
a) - 1
b) 0
c) + 1
d) ∞
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