Apply the difference of angles identity.Simplify terms.Tap for more steps…Simplify each term.Tap for more steps…The exact value of is .Multiply by .The exact value of is .Multiply by .Multiply by .Add and . Expand sin(pi/2-x) Do you need help with math? Try our mobile app Our app allows students to get instant step-by-step solutions to all kinds of math troubles. Try it for Free! Our MATH EXPERTS JackHudson Charlie Trom Lucy Evel