Recent content by Megumi Tao

  1. M

    Can someone help me prove a few identities for pre-calc?

    Can someone help me prove a few identities for pre-calc? Thanks in advance! cos 5? /sin ? - sin 5? /cos ? = cos 6? /sin ? cos ? sin 2? cot ? = 2 cos^2 ? cos 4? = cos^4 ? - 6 sin^2 ? cos^2 ? + sin^4 ?
  2. M

    Can someone help me with a pre-calc problem?

    cos 4? = cos^4 ? - 6 sin^2 ? cos^2 ? + sin^4 ? Thanks!
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