In triangle ABC, angle C is a right angle. If cos A=5/8, what is the value of cos B? (sqrt(x) = square root of x)
A. 3/8
B. 5/8
C. sqrt(39)/8
D. sqrt(89)/8

In order to have plenty of time to answer all required essay questions, a student should a. write as many essays as quickly as possible, then go back and revise each one c. decide which questions are more difficult or will take longer, then answer the easy questions first b. spend equal amounts of time on each question to ensure each questions gets the same amount of attention d. none of these select the best answer from the choices provided a b c d

Assume that the banner needs to be 18 feet long instead of 15 feet

54 points human geography in advance