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$10 Each Maths in Focus Extension 1 (HSC) - Margaret Grove MANSA Mathematics Extension 1 - 2006 Excel HSC Physics - Neville Warren Physics Context 2 Excel Preliminary Chemistry - Jim Stamell Chemistry Contexts 1 Excel HSC Advanced English (Belonging) $5 Each Junior Highschoiol...

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For the above question why is the answer D but not C?

^^ Thanks

Hey guys, how do you prove this? sin%28a-b%29&space;=&space;2&space;sin\frac{%28a-b%29}&space;{2}&space;cos&space;\frac&space;{%28a-b%29}2 Thanks!

Sup guys, got a few questions: 1) The digits 1,2,3,4 are used to form numbers that may have 1,2,3 or 4 digits in them. If one of the numbers is selected at random, find the probability that: it is odd and greater than 3000 (Ans: 3/32) 2) A poker hand of five cards is dealt from a standard pack...

Q) 3,3,4,4,4 and 5 are placed in a row to form a 6 digit number. How many possible combinations there are if the number formed is even. Is the answer this ? (5! x 3)/(2! x 2!) = 90 Thanks

sup guys how do u prove this other than expanding everything, i tried contracting it but it didnt work out well for me :/ sin(5x) + sin(3x) - 2sin(2x)cos(x)=2sin(2x)cos(3x) thanks