(20 points and brainliest ! )
need with these 2 geometry questions whoever answers them correctly i will give brainliest.

Linet passes through (4.5) and is perpendicular to the line shown on the condirate grid.what is the equation of line t in standard form?

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

Find the volume of the solid obtained by rotating the region enclosed by the curves y=1x and y=7^-x about the x-axis. (use symbolic notation and fractions where needed.) volume =