24. 若v(t)=10sin(377t－10°)V，i(t)=10cos(377t－10°)A，則v、i間之相位關係為何？ (A) v(t)領先i(t) 20° (B) v(t)領先i(t) 90° (C) i(t)領先v(t) 90° (D) i(t)領先v(t) 20°