find the exact value of 390 degrees.

can anyone help me figure out how to start this?thanks much

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- November 6th 2008, 12:49 AMdaydreembelievrcot 390 degrees
find the exact value of 390 degrees.

can anyone help me figure out how to start this?thanks much - November 6th 2008, 01:29 AMmr fantastic
- November 6th 2008, 03:08 AMReece
cot(390)

= cot(30)

= cos(30)/sin(30) - November 6th 2008, 03:05 PMdaydreembelievr
why is it equal to cot 30 degrees? sorry if it is obvious.

Is it because 390 - 360 = 30

If so, it it -360 because 360 is a coterminal angle? thanks :D - November 6th 2008, 05:36 PMmr fantastic