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.
Answer: 63/16 = 3 1/16 or 7 if your divide it
Step-by-step explanation:
15%
$45/$300 = 0.15 = 15%
Answer: 2.5, 5.4
41 and there are two left