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Posted by on Tuesday, November 27, 2012 at 5:59am.

if cosx=-1/2,x lies in third quadrant, find sinx.

  • maths - , Tuesday, November 27, 2012 at 6:04am

    x is 60 degrees past 180, or 240 degrees. That is 2pi/3 in radians.

    The sine of x is -sqrt3/2

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