ABC is an isocel triangle such as AB=AC=3 and BC=4 α , β , and γ are its angles. Show that cos(((α+β)/2))=sin((γ/2)) Hi sirs...


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Question Number 86614 by mathocean1 last updated on 29/Mar/20

$A B C i s a n i s o c e l t r i a n g l e s u c h a s$ $A B = A C = 3 a n d B C = 4$ $α, β, a n d γ a r e i t s a n g l e s .$ $S h o w t h a t c o s (\frac{α + β}{2}) = s i n (\frac{γ}{2})$ $H i s i r s . . .$
	Answered by TANMAY PANACEA. last updated on 29/Mar/20

	$\frac{α + β}{2}$ $= \frac{π - γ}{2}$ $= \frac{π}{2} - \frac{γ}{2}$ $c o s (\frac{α + β}{2})$ $= c o s (\frac{π}{2} - \frac{γ}{2})$ $= s i n \frac{γ}{2}$
	Commented by mathocean1 last updated on 29/Mar/20

	$t h a n k y o u s i r .$
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