Find the mean of 17 10 9 8 8 12 6

What basic trigonometric identity would you use to verify that sin x cos x tan x =1-cos^(2)x?

Simplify. −4x^2 (5x^4−3x^2+x−2) −20x^6−12x^4+8x^3−8x^2 −20x^6+12x^4−4x^3+8x^2 −20x^8+12x^4−4x^2+8x −20x^6+12x^4+4x^3−8x^2

If the simple annual interest rate on a loan is 6, what is the interest rate in percentage per month?