find the exact value of 390 degrees.

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

Printable View

- Nov 5th 2008, 11:49 PMdaydreembelievrcot 390 degrees
find the exact value of 390 degrees.

can anyone help me figure out how to start this?thanks much - Nov 6th 2008, 12:29 AMmr fantastic
- Nov 6th 2008, 02:08 AMReece
cot(390)

= cot(30)

= cos(30)/sin(30) - Nov 6th 2008, 02:05 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 - Nov 6th 2008, 04:36 PMmr fantastic