Which Indian cricketer is known as "Brown Bradman"?

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

Who was the first women nominated member of Rajya Sabha of India?

Who was the first living Indian to feature on a postage stamp of India?

According to the Mahabharata, who was the father of Chitrasena, Vrishasena and Satyasena?

Which is the first or oldest church of the world?

What is the SI unit for the power of lens?

Who is known as father of supercomputing?

Can UE monitor RAR in measurement Gap?

C++: Why static function of a class is not allowed to access non-static data members ?

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.

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

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

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