The function simplifies to ...
f(t) = 230
This will be the value for any value of t, so ...
f(2) = 230
when doing tangent the tangent of the angle is equal to the opposite side from the angle over the adjacent side to the angle.
tan43 = x / 12
move 12 over by multiplying each side by 12
12tan43 = x
x = about 11.2