Why does cos2 ( pi - theta ) = cos2theta ?

Update:

Help please

Comments

  • cos(2 * (pi - t)) =>

    cos(2pi - 2t) =>

    cos(2pi)cos(2t) + sin(2pi)sin(2t) =>

    1 * cos(2t) + 0 * sin(2t) =>

    cos(2t)

  • I

    m y creed is to "careful what you wish for" I support nothing that crazy *** hole is for. He dosen't have a clue. Idiots that wanted him,YOU GOTEM!!! God help us all.

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