Thread: find value of inverse trig ratios

arc tan undefined

arc sin 1/2

cos (to the power of -1) - square root of 3 over 2

cos(arc tan 5/13)

Can anyone guide me through these?

arc tan undefined - Where is tangent undefined? That will be your answer. Tangent is undefined at

The other problems can be done by basically working backwards or plugging them into your calculator. If that does not help then I can do a couple more or someone else can.