Prove : cos(3x)=sin(2x)​

Evaluate cos2θ for cosθ = square root of 3/2

What three-dimensional solid have 6 rectangular faces, 2 equal bases that are not rectangles and 18 edges

Choose the right classification of 5x + 3x^4 - 7x^3 + 10 by number terms and he degree 1. third degree polynomial 2. fourth degree polynomial 3. sixth degree polynomial 4. first degree binomial