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Two questions. Find the simplest expression for each of the questions sec^2theta(1-cos^2 theta) and sin^2 theta cos theta + cos^3 theta I would appreciate it if you could show working thanks :)

Aye I dont get the whole deal of negative infinite limits. Could you please explain this example: Find lim x ---> negative infinite x^2+x+3/x^2 The answer is 1 from below... o.0

Models are usually oversimplified, like ohexploitable said, in metallic bonds, models dont show the 'delocalised electrons' or sea of electrons nor do they show the strength of the bonds. The models are how scientists interpret their observations... meaning that all models related to each...

Aye, would any1 know how to solve this question. You are to show the decomposition of a carbonate by heat using appropriate tests to identify carbon dioxide and the oxide as the products. Describe how you selected the carbonate to investigate? I dont really know how to answer this...

OMG I GET IT NOW... thanks guys :)

Aye I started doing functions in the holiday and I came over this question: Find g(x-1) when g (x)= x^2+2x+3 but I don't get it , do I add -1 to every x value or something? The book says answer is x^2+2 Im in year 11 :rolleyes: