# Thread: Need help with trig problem

1. ## Need help with trig problem

Sketch t=3pi/5 on the unit circle.

What is the reference number for t? I know the reference number is 2pi/5.

Find to the nearest hundredth: sin t? cos t?
-How do you find these?

The terminal point determined by t is : ( , ) ?

I need help in solving this problem, and how you go about finding sin and cos.

Thank you!

2. Originally Posted by nikkkk
Sketch t=3pi/5 on the unit circle.

What is the reference number for t? I know the reference number is 2pi/5.

Find to the nearest hundredth: sin t? cos t?
-How do you find these?

... with a calculator

The terminal point determined by t is : ( , ) ?

$\textcolor{red}{\left(\cos\left(\frac{3\pi}{5}\rig ht) \, , \, \sin\left(\frac{3\pi}{5}\right)\right)}$

I need help in solving this problem, and how you go about finding sin and cos.

Thank you!
.