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Question Number 192770 by ajfour last updated on 26/May/23

Commented by a.lgnaoui last updated on 26/May/23

$question not clear$
Commented by a.lgnaoui last updated on 26/May/23

$graphe must be explain to have idea$ $about position of E$
Commented by ajfour last updated on 26/May/23

$T o t h e e y e E, f i n d t h e r a t i o o f t h e$ $v i s i b l e u p p e r h e m i s p h e r i c a l a r e a$ $t o t h e v i s i b l e l o w e r h e m i s p h e r i c a l$ $a r e a . E (a, b) i f c e n t e r b e o r i g i n$ $x a x i s a l o n g a a n d y a x i s a l o n g$ $v e r t i c a l a x i s o f s p h e r e .$
Commented by mr W last updated on 18/Jun/23

$q u e s t i o n i s v e r y c l e a r!$
	Answered by mr W last updated on 18/Jun/23

	Commented by mr W last updated on 18/Jun/23

	$O F = a$ $F E = b$ $O E = \sqrt{a^{2} + b^{2}}$ $\tan θ = \frac{b}{a}$ $\overset{⌢}{A C B} = t o t a l v i s i b l e a r e a$ $\overset{⌢}{A C D} = v i s i b l e a r e a i n u p p e r h e m i s p h e r e$ $\overset{⌢}{D B} = v i s i b l e a r e a i n l o w e r h e m i s p h e r e$ $. . . . . .$
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