If `A+B+C=pi` and `cosA=cosBcosC` then `cotBcotC=1/3` If `5 sinB = sin (2A+B )` then `2 tan (A+B) =3 tan A ` which of the above statements is correct?

If A+B+C=pi and cos A=cos B cos C then cot B cot C=(1)/(3) If 5sin B=sin(2A+B) then 2tan(A+B)=3tan A which of the above statements is correct?

Statement I: If A+B+C=pi and cos A =cos B cos C then cot B cot C=1/3 Statement II : If 5 sin B=sin (2A+B) then 2tan(A+B)=3 tan A Which of the above statements is correct?

If A+B+C=pi and cosA=cosBcosC , then tanBtanC is equal to

If A+B+C=pi and cosA=cosB.cosC show that tanB+tanC=tanA

If sinB=1/5sin(2A+B), then (tan(A+B))/(tanA) is equal to

If sinB=1/5sin(2A+B), then (tan(A+B))/(tanA) is equal to

Statement I: If sinA=sinB , cosA=cosB then A= 2np + B Statement II :If A+B+C=90^@ then sin2A+sin2B + sin2C = 4 sinA sinB sinC Which of the above statements is correct?

If sinB=3sin(2A+B) ,prove :2tanA+tan(A+B)=0.

If tan A = (1-cos B)//sinB , then tan 2A = tan B.

If tan A = (1-cos B)//sinB , then tan 2A = tan B.