TRIGONOMETRICAL
FUNCTIONS [ XI ]
1. Express the following angles in radians:
a. 30° b. 90°
c. 60° d. 45° e. 75° f. 120° g. 30° h.120° i. 135° j. 270°
2. Express the following angles in degrees :
a. π/3
b. 2π/3 c. π/5 d. 5π/3
e. 4π/6 f. π/2
h. 4π/3 i. 12π/4 j. 7π/5 k. 5π/2
3. Find the length of arc of a circle of radius 5 cm suspending 50° at he of the circle .
4. Find the length of arc of a circle of radius 4.5 cm suspending 45°
at he of the circle .
5. Find the length of arc of a circle of
radius 7 ½ cm suspending 60°
at he of the circle .
6.The radius of a bicycle wheel is 70cm
through in one revolution what distance cover by it .
7. The radius of a bicycle wheel is 50cm
through in two revolution what distance cover by
it .
8. The radius of a bicycle wheel is 25.57cm
through in 1
½ revolution what distance cover by it .
9. The difference of two acute angles of a
right angled
triangles is 3π/10 radians
. find the
measure
of the acute angles in radians and degrees.
10. The difference of two acute angles of a
right angled
triangles is 2π/3
radians . find the
measure of the acute angles in radians and
degrees.
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