Question
$\int {\left( {{{\sin }^4}x - {{\cos }^4}x} \right)\,dx = } $
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$3(\sin 3 \theta) x-y+z=2$
$3(\cos 2 \theta) x+4 y+3 z=3$
$6 x+7 y+7 z=9$
का कोई हल नहीं है, की संख्या है: