Angle ? is in quadrant III and angle ? is in quadrant IV. If sin ? = - and cos ? = 1/2, find cos(? + ?).
Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!
(Save $1 )
One time Pay
(Save $5 )
Billed Monthly
*First month only
You can see the logs in the Dashboard.