Question

What is sin 7π4 ?

Answer 1

is the 4 after the pi an exponent?

Answer 2

no, it's 7pi divided by 4

Answer 3

I've been placed in this class for Algebra , but it has me doing pre-cal. I've never taken pre-cal during school... I need help.

Answer 4

it would be \[-\frac{\sqrt{2} }{ 2}\]

Answer 5

7π/4 ? the division sign .

Answer 6

nevermind the other question. it would be the same answer either way

Answer 7

thanks

What is the reference angle for 240°?

Answer 8

60 degrees

Answer 9

Could you tell me how you got that? Please?

Answer 10

this website will help you explain the reference angle:
http://www.mathwarehouse.com/trigonometry/reference-angle/finding-reference-angle.php

Answer 11

thanks

Answer 12

The point (12, 5) is on the terminal side of an angle θ. What is cos θ ?