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Trigonometry

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The measure of one of the equal angles in an isoscles trinagle is twice the measure of the remaining angle. Determine the exact radian measures of the three angles in the triange

  • Trigonometry -

    let the 'remaining' angle of the triangle be x radians
    then each of the other angles is 2x radians

    2x + 2x + x = pi radians
    x = pi/5 radians

    then the "exact" measures of the three angles are
    pi/5, 2pi/5 and 2pi/5

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