Question

If i need to do the sums of trignometry --- what is the basic thing i should know is ;---- plz state it !!!!​

Answer 1

U have to memorize the all the equations.U have to be full focused while work-outing hard problems.In this hard problems has simple answers.U HV to think hard problems in another way.

Answer 2

you should know first ,the values of sin, cos, tan, cot ,sec ,cosec and also trigonometric ratios