Friday

November 28, 2014

November 28, 2014

Posted by **paul c** on Friday, November 24, 2006 at 1:46pm.

R sin(theta + alpha) =

R cos(alpha)sin(theta) +

R sin(alpha)cos(theta)

---->

Rcos(alpha) = 20

Rsin(alpha) = 4

The x-y coordinates of a point on a circle of radius R that makes an angle og alpha with the positive x-axis are with radius R are R cos(alpha) and R sin(alpha) respectively.

R follows from:

20^2 + 4^2 = R^2

If you divide the two equations you get tan(alpha)

**Answer this Question**

**Related Questions**

Calculus - I wanted to confirm that I solved these problems correctly (we had to...

Pre Calc. - Use the sum or difference identity to find the exact value of sin255...

Maths: Partial Differentiation - 1) If x = rcos theta and y = r sin theta, show ...

Algebra II - Multiple Choice Which expression is NOT equivalent to 1? (theta) ...

trigonometry - can you correct the rest for me please? Express each as a ...

trigonometry - can you correct the rest for me please? Express each as a ...

trigonomtry - can you correct the rest for me please? Express each as a function...

Trig - Which expression equivalent to: cos(theta + pi/2). A)cos theta B)-cos ...

algebra - Can someone please help me do this problem? That would be great! ...

trig - Hi, I need to find the domain and rnge of the following: 1. X= 1/2 (cos ...