Bear in mind that, when it comes to trigonometric functions, the location of the exponent can be a bit misleading, however recall that sin²(θ) is really [ sin( θ )]²,
Median is where if you put them in ascending order and cross them off, one from each side at a time, you get to the middle number. 56789 is your answer but so would any group of 5 numbers where two are bigger and two smaller than seven.