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Metamath Proof Explorer

Theorem sinpi

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

		Ref	Expression
	Assertion	sinpi	$⊢ \sin π = 0$

Step	Hyp	Ref	Expression
1		pilem3	$⊢ (π \in (2, 4) \land \sin π = 0)$
2	1	simpri	$⊢ \sin π = 0$