Question 9 (1 point) Which is a solution for the equation 2(1 - cos x) = 240 O 130 O 300 O 3300 Question 10 (1 point) Which of the following values for @ is a counterexample to the claim that cos(x- @) = cos(@) is an identity? O 2 cos( x - @) = cos(@) is an identity. Question 11 (5 points) Determine the exact value of 2 sing cos . Question 12 (5 points) Rewrite tan yx - tan of as a single trigonometric ratio. 1 + tan 9x tan 8x