Theorem sinpi

Description: The sine of _pi is 0. (Contributed by Paul Chapman, 23-Jan-2008)

	Ref	Expression
Assertion	sinpi	$$⊢\sin \mathrm{\pi }=0$$

Proof

Step	Hyp	Ref	Expression
1		pilem3	$$⊢\left(\mathrm{\pi }\in \left(2,4\right)\wedge \sin \mathrm{\pi }=0\right)$$
2	1	simpri	$$⊢\sin \mathrm{\pi }=0$$