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Maths Puzzle
Numerical Ability
If you select 2 cards from a deck, what is the probability of getting 2 matching cards (2kings, 2fives, and so on)?
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Trigonometry Identities
Prove the identity is true
1/cosx - cosx = sinx tanx
I an having trouble with this problem:
square root of X= square root of (x-8) +2