limit of (1 - cosx)/x^2 (1 Viewer)

[phoenix159]

Find the limit of (1 - cosx)/x² as x approaches zero

 

[seanieg89]

Multiply by 1 + cos(x) on numerator and denom, and use that sin(x)/x -> 1 as x -> 0.

Or use cos(x) = 1 - 2sin(x/2)^2.

 

[phoenix159]

thanks