exam 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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exam Other Question

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