Competition has five finalist they can win first second and third place in how many ways can a finalist win

What basic trigonometric identity would you use to verify that csc x sec x cot x = csc^(2)x

Which is an equation for the nth terms of the sequence 12,15,18,21

What are the critical values that correspond to a 95% confidence level and a sample size of 93? a. 65.647, 118.136 b. 59.196, 128.299 c. 57.143, 106.629 d. 69.196, 113.145