What is the measure of this triangle: 16° and 4°?​

Find the sum of the first 8 terms of the following sequence. round to the nearest hundredth if necessary.

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?

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