Question 12 of 20 (5 points) Simplify. sec2 x tan2x cot x csc2x O cot x O tan x O cos X sin~ x O tan* x sin 5 x cost xVITIGUIG Question 15 of 20 (5 points) Simplify. (sin x - csc x)2 O - cos2x + cot2 x O - cos x + csc O - cot2x - cos2x o 1 + cot2 x O cos2 x + cot2xQuestion 16 of 20 (5 points) Identify ALL equivalent forms of the expression. tan2x sec-x - tan x Select all that apply. O tan* x O tan2x (sec2x - 1) O tan' x tan2x (tan2x - 1) tan2 x sec2 xQuestion 17 of 20 (5 points) Identify ALL equivalent forms of the expression. sect + 2 tan t - 4 Select all that apply. O (tan t - 1) (tan t + 3) O tant - 2 tan t - 3 O (tan t + 1) (tan t - 3) O tant + 2 tan t - 3 O tant - 2 tan t - 4Question 18 of 20 (5 points) Identify ALL equivalent forms of the expression. 1 - sint + tant - tant sin t Select all that apply. O cost tan 0 (1 - sin24) (1 + tan2 + ) O sint tan2t - cost sec2t O cost (1 + tan2 t) O cost (sec 2 +) 0 1Question 19 of 20 (5 points) 1 -cos t True or false? sin t + = 2 sec t is an identity. sin t 1 - cos t O True O FalseQuestion 20 of 20 (5 points) True or false? sec*x - 2 sec x + 1 _ ta tan2x is an identity. tan2x O False O True