Some more useful trigonometric formula other than that are following: sin2x=2sinxcosxcos2x=2cos2x−1tan(A+B)=tanA+tanB1−tanA⋅tanBAnswer and Explanation: To prove: tanA+tanB+tanC=tanA⋅tanB⋅tanC We know that ...
Prove that: (cos(A+B+C)+cos(-A+B+C)+cos(A-B+C)+"cos"(A+B-C))/(sin(A+B... 09:08 If sintheta=n"sin"(theta+2alpha) , prove that tan(theta+alpha)=(1+n)/... 03:57 Free Ncert Solutions English Medium NCERT Solutions ...
If in a triangle ABC,tanA+tanB+tanC>0the triangle is (A) acute angled triangle (B) obtuse angled (C) right angled (D) none of these View Solution Free Ncert Solutions English Medium NCERT Solutions NCERT Solutions for Class 12 English Medium ...
IfA+B+C=π, prove that :cotA+cotBtanA+tanB+cotB+cotCtanB+tanC+cotC+cotAtanC+tanA=1 View Solution IfA+B+C=180∘,thencotA+cotB+cotC)cotAcotBcotCis equal to View Solution The expressiontanA1−cotA+cotA1−tanAcan be written as ...