Copyright © University of Cambridge. All rights reserved.

'Climbing' printed from https://nrich.maths.org/

Show menu

The graph of $y=\sin x$ lies above the line $y=2x/\pi$ joining the origin to the point $(\pi/2, 1)$. The graph of $\sin x$ lies below the line $y=x$. Why? What does this tell you about $\sin x$?