exam
Maths Puzzle
Numerical Ability
Prove that:
1 + cos A/ 1 - cos A = tanČA/(secA - 1)Č
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exam Other Question
An airplane flew for 6 hrs w/ a 22-km/h tail wind.THe return flight against the same wind took 8 hrs.Find the speed of the plane in still air.
-3-(7)/3-5 is the question. i am haveing trouble with the positive and negative. when you add and subtract and when it becomes multiplacation