Test: Trigonometric functions I - Normal

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Question 1:   Convert 25° to radians.
2π 3
7π 36
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?
20π 3
15π 4
3π 20
4π 15
Question 4:   Solve the expression 3tg180°4ctg90° .
0
3
1
7
Question 5:   Solve the expression cos 60° +ctg 45° .
1
1 2
0
1
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