how do you find them?

examples:

tan18

sin205

cos-55

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- December 15th 2011, 08:29 PMahmedbprinciple angles and related acute angles
how do you find them?

examples:

tan18

sin205

cos-55 - December 15th 2011, 10:08 PMProve ItRe: principle angles and related acute angles
- December 18th 2011, 08:08 PMahmedbRe: principle angles and related acute angles
what i mean is like quadrant 1, 2, 3, and 4.

- December 19th 2011, 06:13 AMsbhatnagarRe: principle angles and related acute angles
Here's a little easier method:

Unfortunately, and have no exact values. - December 19th 2011, 07:40 AMskeeterRe: principle angles and related acute angles