I have a trig question. How do you I solve this. I appreciate much if you could show it step by step. Find all the value of in the interval $[0,2\pi]$ for which $\cos(\pi/2+t)\ge 0$.
How to solve $\cos(\pi/2+t)\ge 0$?
0
$\begingroup$
trigonometry
-
0The answer in my solution book is : t E [pi,3pi/2] or t E [3pi/2,2pi]. Can anyone tell me how to reach the answer? – 2012-09-28