Find the exact values of the following.
cos 270 degrees = 90 degrees, value = 0.
Sin 180 degrees = 180-90 = 90 = 1, but its supposed to be zero, don't know how to get that:\
Confused with tan 240 degrees as well.
Calculus - Reiny, Monday, October 24, 2011 at 11:17pm
for the first two, like I told you in the last post, look at the graphs
for tan 240°
1. where is the angle ? in III , so the answer is -
2. how far to the x-axis? 60°
so tan240° = -tan60° = √3/1 , (from the 30-60- 90 triangle ratio)
always check with your calculator