Post a New Question

Math- Simplifying Identities

posted by on .

1.) cot(-θ)(secθ)
I think the answer is secθ but I don't know how to get this.

2.) (tanθ) / (cos)(90° -θ)

3.) 3sin2xcos2x - sin4x

4.) (cosx + tanx) / (csc^2 x)

  • Math- Simplifying Identities - ,

    = cos(-Ø)/sin(-Ø)(1/cosØ
    = (cosØ/-sinØ)(1/cosØ
    = - 1/sinØ
    = - csc(Ø)

    (test your answers with some weird angle, don't use 30's , 60's, or 45's)

    2. you will have to know that
    cos(90°-x) = sinx
    take it from there

    3. 3sin2xcos2x - sin4x
    = 3sin2xcos2x - 2sin2xcos2x
    = sin2xcos2x
    or (1/2)sin4x

    4. change everything to sines and cosines and just mess around with it.

    make sure to test your answer vs the original with some strange angle on your calculator.

Answer This Question

First Name:
School Subject:

Related Questions

More Related Questions

Post a New Question