Test: Trigonometric functions I - Normal

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Question 1:   Convert 25° to radians.
7π 36
2π 3
π 2
5π 36
Question 2:   Convert 11π 6 to degrees.
225°
330°
45°
270°
Question 3:   A radian measure of an arc α in a circle equals 3π 4 while radius R equals   5cm .  What is the length l of this arc?
3π 20
20π 3
4π 15
15π 4
Question 4:   Solve the expression 3tg180°4ctg90° .
1
0
7
3
Question 5:   Solve the expression cos 60° +ctg 45° .
1 2
1
1
0
Question 6:   Solve sin660° .
3 2
1 2
3 2
1 2
Question 7:   Which interval is decreasing for function y=cosx .
Question 8:   Which of this points the graph of function y=tgx crosses?
π 4 ;1
π 4 ;1
π 2 ;0
π 2 ;0
Question 9:   Simplify the expression 1 sin 2 α+ct g 2 α× sin 2 α .
1 cos 2 α
0
1
1
Question 10:   Simplify the expression cos α+β +cos αβ .
cosαcosβ
2sinαsinβ
sinαsinβ
2cosαcosβ