book Maths Puzzle Numerical Ability

prove that 1 - tan^2x = (1 - 2sin^2x)(1+tan^2x)

Read Solution (Total 0)

book Other Question

A tea Shop has 20 lbs of tea that sells for 3$ per pound. How many pounds of tea that sells for 6$ per pound should be mixed with the 20 pounds of $3-per-pound tea to obtain a blen 4. Stan and Hilda can mow the lawn in 40 minutes if they work together. If Hilda works twice as fast as Stan, how long would it take Stan to mow the lawn alone?
5. A commercial je