How to find the derivative of cos^2x? i seem to be confused.
i was told to use the chain rule, but i don't see how it can apply.
can't i just substitute (cos x)(cos x) in its place and then use the product rule? isn't cos^2 x = (cos x)(cos x)?
let me know if i am right. if not, then explain how to use the chain rule ; how are you getting: ?

Find the solution set of this inequality. select the correct graph. |8x+16|> 16

Phyllis and chen are saving money to go to a football game. each friend starts with some money and saves a specific amount each week. phyllis made a graph to show the total she has saved at the end of each week. chen wrote an equation to show the total, y, he has saved at the end of each week, x. y = 15x + 15 compare the amount that each friend has when both friends start saving. select the correct answer from the drop-down menu to complete the statement. phyllis starts with $ and chen starts with $

Angela took a general public aptitude test and scored in the 88th percentile for aptitude in accounting. what percentage of the scores were at or below her score?