Hi I have 9 easy practice math questions for trigonometry

I just need answers, please do not show work that way I can find out if I'm wrong.

I'm using this to compare to my original answers. Please write neatly and circle answers.

. Question 6 If cos I = >. where x in quadrant IV, then find the exact value of each of the following. sin (2x)= cos(21) = tan(2x) = Question Help: Video 1 Video 2 Question 7 Use a double-angle or half-angle formula to simplify the given expressions. (a) If cos? (21 ) - sin? (210 ) = cos(A ), then A = degree (b) if cos (6z) - sin?(6z) = cos(B), then B = Question Help: .Worked Example 1 Question 8 If sin(z) = , and z is in quadrant I, determine the exact value of each of the following. Use fractions and radicals only. no decimals. You do not need to rationalize the denominator. sin ( 2) = 390 cos( 2) = 330 tan ( 2) = 60 Question Help: Video . Question 11 Find all solutions to 4 sin (0) = 2 on the interval 0 Solve 2 cos (t) - 3 cos(t) + 1 = 0 for all solutions on the interval 0 S t