also tan(2t)=

If sin t = -, and t is in quadrant I, find the exact value of sin (2 t), cos (2 t), and tan (2 t) algebraically without solving for t. Enclose numerators and denominators in parentheses. For example, (a - b) / (1 + n). sin (a) ? sin (2 t) = sin (a OO ? cos (2 t) =