Posted by **Shreya** on Tuesday, November 6, 2012 at 8:14pm.

Trigonometric Functions, Radian Measure

∏ <-- will be using this for pi

Using exact values, convert to radians ( hint use fraction of ∏)

90° = 90°*∏/180° = 1∏/2

^^would it be right to also call it 2∏ radians?

Determine the angle at the centre of the circle, radius 6cm, for each arc length.Express each angle in radians and then in degrees.

3cm

a = rθ

3 = 6θ

1/2 = θ

1/2*180°/∏

=28.6°

^One of my friends got a totally different answer, and she got

θ = 2 rad

2*180/∏ = 114.59

^Ive no idea how she got that :S

## Answer This Question

## Related Questions

- calculus - Verify the identity: arctanx + arctan(1/x)=∏/2 using calculus ...
- Math-Trig - 1. Create an algebraic expression for sin(arccosx-arcsin3x) 2. The ...
- calculus - evaluate the integral I= ∫(0,∏/4) ((5-3e^(-tanx))/(cos^(2...
- MAths - Let r1,r2,r3 be the roots of polynomial P(x)=x^3+3x+1. Evaluate the ...
- Maths - Tan[2*tan⁻¹⅕-∏/4]
- math - There is a diagram of a running track. The track is made up of two ...
- Statistics - A national opinion poll found that 44% of all American adults agree...
- CALCULUS - If cos(t)=–7/9, find the values of the following trigonometric ...
- Calculus - Determine the exact values of the six trigonometric functions of the ...
- Trig - Rewrite -25 degrees in radian form. -25 =-25(pi radians/180) =-25pi/180 ...

More Related Questions