Recent content by whittwhitt

Help with Double Angle Identities! cos θ = 24/25 The angle lies in quadrant 1; 0<θ<90 Find sin2θ I know you would use either the formula cos^2θ - sin^2θ or 2sinθcosθ And I know that the answer is 339/625, but I do not know how to get that answer?