# Thread: Trig Function of Real #s Help!

1. ## Trig Function of Real #s Help!

I have four problems I need my answers checked and explained in Baby Steps. I am trying to figure out the best way to solve these problems.

1. Convert pi/4 radians to degrees

2. If a circle has a radius of 29cm, determine the length of an arc s subtended by an angle of 37 Degrees.
s= 18.72738287cm

3. Find the point (x,y) on the unit circle which corresponds to teh angle -70pi/3.
a. (x,y) = (-1/2, SquareRoot of 3/2)
b. (x,y) = (-.5, .866025904)

4. Two pulleys are connected by a belt. The radius of one pulley is 9cm and the radius of the other is 77cm. If the larger one rotates once, how many times N does teh small one rotate?
N= 77/9

Thank You for your help. I am terrible at Pre-Cal, and I just want to make sure I am completing these problems in the best way possible! I have 4 More to come!

2. Originally Posted by Atav20
I have four problems I need my answers checked and explained in Baby Steps. I am trying to figure out the best way to solve these problems.

1. Convert pi/4 radians to degrees

2. If a circle has a radius of 29cm, determine the length of an arc s subtended by an angle of 37 Degrees.
s= 18.72738287cm

3. Find the point (x,y) on the unit circle which corresponds to teh angle -70pi/3.
a. (x,y) = (-1/2, SquareRoot of 3/2)
b. (x,y) = (-.5, .866025904)

4. Two pulleys are connected by a belt. The radius of one pulley is 9cm and the radius of the other is 77cm. If the larger one rotates once, how many times N does teh small one rotate?