Posted by **Hannah** on Sunday, February 28, 2010 at 12:27pm.

verify the identity

sin x(1 - 2 cos^2 x + cos^4 x) = sin^5 x

1-2cos^2 x looks like 2cos^2x-1 its just backwards. I am not sure where to start.

## Answer this Question

## Related Questions

- Math - Solving Trig Equations - What am I doing wrong? Equation: sin2x = 2cos2x ...
- verifying trigonometric identities - How do I do these problems? Verify the ...
- Math - Solve this equation algebraically: (1-sin x)/cos x = cos x/(1+sin x) --- ...
- Pre-calc - Verify this identity. How would you prove it (sin^3(x)+cos^3(x))÷(1-...
- TRIG! - Posted by hayden on Monday, February 23, 2009 at 4:05pm. sin^6 x + cos^6...
- Math, derivatives - f(x) = x² + 2Cos²x, find f ' (x) a) 2(x+cos x) b) x - sin x ...
- Pre-Cal - 1) Verify the identity cos^2 B - sin^2 B = 2 cos^2 B -1 I know that ...
- trig - I dont understand this. can you please tell how you got each answer? ...
- Math - Calculus - The identity below is significant because it relates 3 ...
- Math - Solving for Trig Equations - Solve the following equation for 0 less than...