1
What is the arc length of a sector with radius 10 cm and angle π/2 radians?
2
What is the reciprocal of cos θ?
3
What is the sector angle of a circle if the arc length is 10 cm and the radius is 5 cm?
4
What is the bearing of West?
5
A tower casts a shadow 20 m long when the sun's elevation is 30°. How tall is the tower?
6
What is the area of a sector with radius 4 cm and angle 90°?
7
What is the back bearing of 135°?
8
Convert 120° to radians.
9
In a right-angled triangle, if sin θ = 0.6, then cos θ is approximately:
10
Which of the following is a Pythagorean identity?
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