The answer is 1/2n-4
Multiplying a number n by 1/2 is the same as dividing that number by 2.
theta is in the fourth quadrant where the cosine is positive.
the third side in the triangle = sqrt (4 - 2) = sqrt2
So sin theta = -sqrt2/2 = Second choice (negative because sine is negative in 4th quadrant)
tan theta = - sqrt2 / sqrt2 = -1
f(x)=40
x=8
so if x=2 it would be 40/8 which is 5
184.2 is the answer to 4 significant figure