- Show : (x - 2cos20)(x + 2cos40)(x + 2cos80) = x³ - 3x - 1. ... ...?

Discover Questions

How long does a ball stay in the air with a vertical speed of 20m/s and a horizontal speed of 30m/s? Forces and Motion problem? Why is bread moulds regarded as a thallus plant? Solve by factoring. Show all steps for full credit.: a) 49x^2 - 36 ... b) x^2 + 2x - 24 ... c) 3x^2 - 7x -6? Does cis(0.5α) equal to cis(-0.5α)? Thanks and have a wonderful day!?