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What kind of effect would a national minimum wage have, is it positive or negative ?

A national minimum wage sets the minimum hourly wage rate that is acceptable by law. It is needed for a variety of reasons. It has several advantages including reducing poverty and reducing gap between rich ...
OO
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Show that the integral ∫(1-2 sin^2⁡x)/(1+2sinxcosx) dx = (1/2) ln2 between the limits π/4 and 0. [5 marks]

First, we use the trig identities: cos2x=cos^2x-sin^2x, cos^2x+sin^2x=1 and sin2x=2sinxcosx to transform the integral to ∫(cos2x)/(1+sin2x)dx. We know that ∫f'(x)/f(x)dx = ln|f(x)|+c, so we let f(x)=1+sin2x....
AC
Answered by Abby C. • Maths tutor
16650 Views

Define an exothermic reaction.

A reaction in which energy is released into the surroundings by the system.
BG
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Write (√(18)+10)/√(2) in the form: p + q√2 [4 marks]

First, simplify √18 by writing it as √(9x2) = √9 x √2 = 3√2. Then, rationalise the denominator by multiplying both top and bottom of the fraction by √2. This gives √2 x √2 = 2 in the denominator, and (3√2+10...
AC
Answered by Abby C. • Maths tutor
21500 Views

How do I use critics effectively?

Most people use critics to support an argument, showing that they have come up with valid points and have read widely around the subject. However to push this further the key word for me is engage. You must ...
EK
Answered by Elizabeth K. • English tutor
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