Will mark as brainiest Simplify the expressions: a) sin(arcsin(x)) and arcsin(sin(x)) b) cos(arccos(x)) and arccos(cos(x)) c) tan(arctan(x)) and arctan(tan(x))

Atest consists of 10 multiple choice questions, each with 5 possible answers, one of which is correct. to pass the test a student must get 60% or better on the test. if a student randomly guesses, what is the probability that the student will pass the test?