Find the area of the triangle.

Idont get this question can someone me solve it? ** the distance light travels in one second (1 light second) is about 1.86 ×10^5 mi. saturn is about 475 light-seconds from the sun. about how many miles from the sun is saturn..my guess is 8.83* 10^7 you so much

Anyone know? will mark brainliest if correct

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