Basic Notation and Sine Law OF Triangle

cosine law OF triangle

Basic introduction OF Solution OF Triangle

With usual notations prove that in a triangle ABC, cot(A/2)+cot(B/2)+cot(C/2)=s^2/Delta

With usual notations, if in a triangle ABC (b+c)/(11) = (c+a)/(12) = (a+b)/(13) , then cos A : cos B : cos C is :

With usual notations,prove that in a triangle ABC cot A+cot B+cot C=(a^(2)+b^(2)+c^(2))/(4Delta)

Vector Addition||Law OF Triangle /Parallelogram

With usual notation,if in a triangle ABC ,(s-a)/(5)=(s-b)/(6)=(s-c)/(7), then value of cos C is-

If the sines of the angle A and B of a triangle ABC satisfy the equation c^(2) x^(2) - c (a + b) x + ab = 0 , then the triangle