Answer:
I have no answer.
Step-by-step explanation:
You need to add more information.
I hope this helps, i got it from a cheat sheet online
Answer:
Step-by-step explanation:
Answer:
The answer is a. cos2x - sin2x - sin x. Use the rule: cos2x = (cos^2)x - (sin^2)x. So, substitute cos2x in the expression: cos2x - sinx = ((cos^2)x - (sin^2)x) - sinx = (cos^2)x - (sin^2)x - sinx. Therefore, choice a. is correct choice.