U uh son uh New member Jan 10, 2011 #1 verify identity 6.) cos^2 x -sin^2 x = 2cos^2 x-1 42.) sinx(1-2cos^2 x+cos^4 x)= sin^5 x please show how i can solve this by showing work
verify identity 6.) cos^2 x -sin^2 x = 2cos^2 x-1 42.) sinx(1-2cos^2 x+cos^4 x)= sin^5 x please show how i can solve this by showing work
