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(Core 3 level) Integrate the function f(x) = 2 -cos(3x) between the bounds 0, pi/3.

f(x) = 2 - cos(3x)integrate function x term2 -> 2x (raise power of x then divide by new power for polynomial functions of x) -cos(3x) -> -(1/3)(sin(3x)) (using a substitution of 3x = u, then cos(u) int...
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Answered by Riku G. • Maths tutor
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How do I effectively revise for an essay question?

Remember here that there are two things that examiners like to see: knowledge and skill. Focus your revision separately on these two things and then bring them together to give a great answer. To revise know...
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Answered by Connie R. • History tutor
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Describe the electrolysis of potassium iodide in water. Include the overall balanced chemical reaction and the electrode reactions

The overall reaction is 2I - (aq) +2H 2 O (l) --> I 2(aq) + H 2(g) + 2OH - (aq) , the anode reaction is 2I - (aq) --> I 2(aq)­­ + 2e - and the cathode reaction is 2H + (aq) + 2e - --> H 2(g) . In aq...
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Answered by Pete H. • Chemistry tutor
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How do I work out if two lines are parallel?

The gradients of the two lines must be the same. The gradient is m in the equation: y=mx+c For example: L1: y = 3x – 2L2: 3y – 9x + 5 = 0 First rearrange L2 so it is in the same form as L1 to get:3y=9x-5Then...
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Answered by Alexandra B. • Maths tutor
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What is inflation and how can we measure it?

Inflation is when prices increase we can measure it using CPI and PPI data (basket of goods model)
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Answered by Luqman B. • Economics tutor
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