- #1
Krypto78
- 21
- 0
Homework Statement
Determine the following and state quadrant.
cos(-65°)
Homework Equations
I make this the 2nd quadrant.
The Attempt at a Solution
where:-
-cos(180 - θ)
-cos ( 180 - (-65))
-cos245
= 0.423
however i wasnt sure if it lied in the 4th quadrant
so:-
-cos(360 - θ)
-cos ( 360 - (-65))
-cos425
= 0.423
Can anyone help me understand this PPPPUUUUURRRRRRLEASE.
Thanks guys.