Get the answers you need at Westonci.ca, where our expert community is always ready to help with accurate information. Get quick and reliable solutions to your questions from a community of experienced professionals on our platform. Get precise and detailed answers to your questions from a knowledgeable community of experts on our Q&A platform.

Which expression is equivalent to cos 150°?
Our three choices are:
A. cos 30°
B. cos 330°
C. cos (-30°)
D. cos (-210°)