Find the exact values of sin(2θ), cos(2θ), and tan(2θ) given sec(θ) = − 15/9 and θ is in the interval [pi/2, pi]

i have cos(2theta) which is -7/25 but i miscalculated the other values.

Someone me i need with this stuff

Write the contrapositive of the conditional statement. determine whether the contrapositive is true or false. if it is false, find a counterexample. a converse statement is formed by exchanging the hypothesis and conclusion of the conditional. a) a non-converse statement is not formed by exchanging the hypothesis and conclusion of the conditional. true b) a statement not formed by exchanging the hypothesis and conclusion of the conditional is a converse statement. false; an inverse statement is not formed by exchanging the hypothesis and conclusion of the conditional. c) a non-converse statement is formed by exchanging the hypothesis and conclusion of the conditional. false; an inverse statement is formed by negating both the hypothesis and conclusion of the conditional. d) a statement not formed by exchanging the hypothesis and conclusion of the conditional is not a converse statement. true

What adds to be the bottom number but also multiplies to be the top number with 8 on the bottom and 15 on top