(a) A, B,C, D are the four interior angles, taken in order, of a cyclic quadrilateral. Prove that: cot(A) + cot(B) + cot(C) + cot(D) = 0.

(b) If cos(x) + sin(x) = m and sec(x) + cosec(x) = n, prove that n(m^2- 1) = 2m.

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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%

Ab and bc are tangent to circle d. find x is ab = 3x + 8 and bc = 26. find x

The two box p digram the two box plots show the data of the pitches thrown by two pitchers throughout the season. which statement is correct? check all that apply. pitcher 1 has a symmetric data set. pitcher 1 does not have a symmetric data set. pitcher 2 has a symmetric data set. pitcher 2 does not have a symmetric data set. pitcher 2 has the greater variation. ots represent the total number of touchdowns two quarterbacks threw in 10 seasons of play