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Question : 30 of 90
Marks:
+1,
-0
Solution:
‌=‌⇒dy=‌⇒y=−‌+cWhen
x=‌,y=‌ gives
c=1So
y=‌⇒y=‌Now,
y=√2‌sin‌x⇒sin‌x=0or
sin‌x+cos‌x=‌sin‌x=0 gives
x=Ï€ only.
and
sin‌x+cos‌x=‌⇒sin(x+‌)=‌So
x+‌=‌ or
‌⇒x=‌ or
‌Sum of all solutions
=π+‌+‌=‌Hence,
k=42.
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