Prove that (cos 11+ sin 11)/(cos11 - sin 11)=tan 56 Share with your friends Share 16 Vipin Verma answered this LHS =cos11 + sin11cos11-sin11 =cos11 + sin11cos11cos11 - sin11cos11 =1+tan111-tan11=tan45 + tan111-tan45.tan11 = tan(45 +11) = tan56 = RHS 59 View Full Answer
