knowing that 2(theta) can be written as theta + theta, find the expression for sin2(theta) and cos2(theta).

Is it 2sin(theta)cos(theta)?

1 answer

yes,
sin 2x = 2 sinx cosx
cos 2x = cos^2 x - sin^2 x
Similar Questions
    1. answers icon 2 answers
  1. Multiple ChoiceWhich expression is NOT equivalent to 1? (theta) means 0 with dash in it. A.)sin^2 (theta)+cot^2 (theta) sin^2
    1. answers icon 0 answers
  2. 1. Which expression is equivalent to cos 2theta for all values of theta ?cos^2 theta – sin^2 theta ~ cos^2 theta – 1 1 – 2
    1. answers icon 1 answer
  3. Solve the following trigonometry identities.a) 1-cos2(theta) = sin(theta)cos(theta)/cot(theta) b)
    1. answers icon 1 answer
more similar questions