The value of cos x and tan x is less tan x is less than 0, means angle x lies in the second quadrant as in second quadrant cosine and tangent of an angle is negative.
Determine the measure of angle x from the equation cos x = -8/17.
Substitute 118.07 for x in the expression sin 2x to obtain the value of sin 2x.
Thus, value of sin 2x is -0.83.
OR
Determine the value of sin x by using trigonometry identity.
Determine the value of sin 2x by using trigonometry identity.
So answer is -240/289.