Question

Which expression is equivalent to sqrt 1-cos(10x) / 2

Answer 1

The expression is

$\sqrt[]{\frac{1-\cos (10x)}{2}}$

Using the half angle formula:

$\sin \frac{\theta}{2}=\pm\sqrt[]{\frac{1-\cos \theta}{2}}$

If θ=10x then we can replace it in the formula:

$undefined$