Apply the sum of angles identity.Simplify each term.Tap for more steps…The exact value of is .Combine and .The exact value of is .Combine and . Expand sin(pi/4+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