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How do you know when to use sin, cos and tan?

When trying to work out and unknown angle in a right angled triangle, if you know the length of two sides you can use these the figure out the right trig function to use. SOH CAH TOA is an easy way to rememb...
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Answered by Emily D. • Maths tutor
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How do you intergrate basic algebra?

To integrate basic algebra you add one to the power of a value and then divide the coefficent by the new power, for example:To intergrate: 16x 3 You firstly add one to the power to get: 16x 4 Then you divide...
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How do you differentiate simple algebra?

For differentiation you simply multiply the coefficient of the unknown variable that you are differentiating by the power of the coefficient, then minus one from the power. For example to differentiate 3x 3 ...
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Completing the square of 2x^2 - 8x + 7 = 0

First divide everything by 2:x 2 - 4x + 3.5 = 0Then divide number in front of the x by 2 and put it in a bracket squared + x. Then outside the bracket subtract the halved number squared. Keep the symbol the ...
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Answered by Maria H. • Maths tutor
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Given (x-2) is a factor of ax^3 + ax^2 + ax - 42, find the value of a

let f(x) = ax^3 + ax^2 + ax - 42if x-2 is a factor of f(x), then by remainder theorem, f(2) = 0and:a(2)^3 + a(2)^2 + a(2) -42 = 08a + 4a + 2a - 42 = 014a = 42a = 3
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Answered by Jay H. • Maths tutor
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