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March 24, 2017

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find the exact value for cosine and sine of 2,1oo degree thanks

  • ALGEBRA 2 help please would appreciate - ,

    I guess that is 2100 degrees. Well, you know
    cos or sin of Theta= cos or sin (theta-n*360)

    so what is n?
    2100/360= 5 and remainder 120 deg

    sin2100= sin120 deg
    but sin120=sin(180-120)=sin60
    cos2100=cos120=-cos(180-120)=-cos60=-sin30

    check this.

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