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?

Which singer was originally named Eileen Angelina Yeoward?

Which of these scientist was inspired to make its famous discovery in a sea voyage in 1921?

Which is the only talkie film directed by Dada Saheb Phalke?

Which company started by Europeans in Calcutta in 1818 was the first modern life insurance company established in India?

Which Shakespeare play was translated by the Bhartendu Harishchandra with the title Durlabh Bandhu, published in 1880?

Does 5G NR device contains two cellular chip?

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?