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3 simple steps: Expand out brackets. Group like terms together. Make x the subject of the equation.
Firstly, xcos(x) is a product of two functions of x. Therefore we can use the product rule to work out the derivative of the whole function. Differentiating each part makes it easier to visualize the ...
First simplify both sides:2 1/5 = 11/5 1 3/4 = 7/4Then find common denominator by multiplying denominators:4/5 = 20Times denominators by opposite denominator (do to top and bottom):7/4 = 35/20 13/5 = 44/2...
We know the perimiter is split into the proportions 3:4:5 therefore by adding 3+4+5 we can work out what fraction of 72cm each side is.Thus 3/(3+4+5) = 3/12 = 1/4 is the fraction of 72 that belongs to the...
Cosec2A - cot2A= tanALeft hand side=1/sin2A - cos2A/sin2A=(1- cos2A)/sin2A=(1-(1- 2 sin^2 A)/ 2sinAcosA=(1-1 + ( 2 sin^2 A))/ 2sinAcosA=sinA/cosA=tanATherefore ...
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