February 26, 2017

Homework Help: trig

Posted by Yul on Monday, November 14, 2011 at 12:23am.

cosθ =5/13 with -π/2 < θ <0 find each of the following

sin( θ - 5π/4)
cos( θ - 11π/6)
tan( θ + 5π/4)

can some1 explain to me how to do these? im completely lost and this is the only thing about my assignment that i cant do can someone please help me?

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