If 0 < x < (π / 2) and secx = cosecy, then the value

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secx = cosecy
⇒ cosx = siny

⇒ sin		π	- x		= siny
		2

⇒ y =	π	- x
	2

⇒ x + y =	π
	2

∴ sin (x + y) = sin	π	= 1
	2

	1
	√3