KeerthanaPosted on What is the value of sin −7π4frac{-7 pi}{4}4−7π ? a−23frac{-2}{sqrt{3}}3−2 b23frac{2}{sqrt{3}}32 c12frac{1}{sqrt{2}}21 d−12frac{-1}{sqrt{2}}2−1 Answer : Option CExplanation : sin(−7π4)=−sin7π4sin left(-frac{7 pi}{4} ight)=-sin frac{7 pi}{4}sin(−47π)=−sin47π =−sin(2π−π4)=-sin left(2 pi-frac{pi}{4} ight)=−sin(2π−4π) =sinπ4=12=sin frac{pi}{4}=frac{1}{sqrt{2}}=sin4π=21 [sin (2π – θ) = – sinθ] Rate This:NaN / 5 - 1 votesAdd comment
