Which Indian cricketer is known as "Brown Bradman"?

Which of the countries has had a prime minister whose name featured the name of his country?

Which of the gulf city was a dependency of Bombay Presidency under British rule for almost a century?

Which of the following Pair are not parent and child who have both won the Nobel prize?

Why throw stones into the pond, why is blacksmith?

Bihar Vidhan Sabha ke upadhyaksh kaun hai

Why is the ripple formed by throwing stones into the pond?

number of isomers of C 7h7CL is

SGW: What is the role of serving gateway in LTE network ?

How paging is handled during TA update ?

cos(A+B)/cos(A-B) =cosAcosB-sinAsinB/cosAcosB+sinAsinB =1-tanAtanB/1+tanAtanB =1-3/1+3 =-2/4 =-1/2

The answer is -1/2. Tan A=Sin A/Cos A Tan B=Sin B/Cos B Tan A*Tan B= SinASinB/CosACosB=3 SinASinB=3CosACosB Cos(A+B)=CosACosB-SinASinB =CosACosB - 3CosACosB = -2CosACosB Cos(A-B)=CosACosB + SinASinB =CosACosB + 3CosACosB =4CosACosB Cos(A+B)/Cos(A-B) = -2CosACosB/4CosACosB = -1/2.

If in a triangle ABC: Cos A + Cos B + Cos C = 3/2 then what is so special about this triangle?

What would be the value of Sin(50 + A) - Cos(40 - A), share your working also?

Try to solve this problem using substitution of only basic values of trigonometric functions(30,60,90) and post the complete solution?