Ask your own question, for FREE!
Mathematics 8 Online
NvidiaIntely:

What is the y-value for f(x) = cos(x) when x = -90°?

Tranquility:

Have you learned about the unit circle yet? -90 degrees is the same as 270 degrees.

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!