Prove that:
Sin x - Sin 3x + Sin 5x - Sin 7x
= Cot 2x
Cos x-Cos 3x - Cos 5x + Cos 7x​

11. minitab software was used to find the lsrl for a study between x=age and y=days after arthroscopic shoulder surgery until an athlete could return to their sport. use the output to determine the prediction model and correlation between these two variables. predictor coef se coef t p constant -5.054 4.355 -1.16 0.279 age 0.2715 0.1427 1.9 0.094 r-sq = 31.16%

The angles below are supplementary. what is the value of x? a pair of supplementary angles is shown. one angle measures 7x + 33, and the other angle measures 70. 5.3 8.14 11 14.7

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83