Trigonometry Answers

What radian measure is equivalent to 145°?


a) 15π/32


b) 32π/15


c) 36π/29


d) 29π/36

What is the measure of the central angle of a circle, in degrees, with radius 5 m that intercepts a 2 m arc?


a) 0.4


b) 22.9


c) 72


d) 143.2

What is the length of the arc on a circle with radius 16 ft intercepted by a 60° angle?


a) 5.3


b) 15.3


c) 16.8


d) 960

Mr. Elliott is heading on a ski trip to Revelstoke Mountain. While driving his car towards the mountain Mr. Elliott measures the angle of elevation to the top of the mountain to be 5°. He drives 15 km closer to the mountairn and measures the new angle of elevation to be 22°. Assuming Mr. Elliott was driving on a level (flat) road, find the height of the mountain (in metres).

simplify (sin^2(x)+2sin(x)+1)/(sin^2(x)+sin(x))

Voltage = V1=3sin(wt) V2=cos(wt) V3=v1+v2
Find the expression in sine waveform v3=Rsin(wt+phase angle)
verify the resultant voltage is in the same frequency as v1 and v2


W= Waveform

I need to establish the identity.
(sin^3theta+cos^3theta)/(sin theta + cos theta) = 1 - sin theta * cos theta

From the top of the buiding 60 m high, the angle of elevation of the top of a vertical pole is 15. At the bottom of the building the angle of elevation of the top of the pole is 35. Find (a) the height of the pole and (b) the distance of the pole from the building.

Complete the identity
sin(a-b)/cos a cos b=?

Complete the identity?
sinx/cosx + cosx/sinx=