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    Biology CSSA past papers

    Does anyone have biology CSSA Past papers and worked solutions?? Please post them up if you have them ... Thx in advance!
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    2004 CSSA Trial Paper ... Mistake?

    Has anyone done the 2004 CSSA HSC Trial papers?? I was just wondering for question 23... "Coal, containing 0.1% sulfur, is burned in a power station. Calculate the volume of sulfur dioxide released at 25 degrees Celsius and 100kPa when 10.0 million kg of coal is burned." Supposedly, to...
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    Shm

    Just looked at this example... x = 3 cos 2t + 4 sin 2t = 5 cos (2t - @ ) where 0 < @ < pi/2 and tan @ = 4/3 How did x get simplified ot the second line, can anyone explain that? Thx
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    Inverse Trig Functions

    How do you work out questions like: Inv. tan 1/2 + inv. tan 1/3 i.e. tan^-1 (1/2) + tan^-1 (1/3) Leaving answer in radian form... Thx
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