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In the triangle XYZ XY = 5.6 cm YZ = 10.5 cm angle XYZ = 90 Work out the length of XZ

Triangle XYZ forms a right angles triangle, so pythagoras' theorem can be used to calculate the missing side. We are given the two side length adjacent to the right angle, so we need to find the hypotenuse. ...
MH
Answered by Miss H. • Maths tutor
8669 Views

How do you solve simultaneous equations?

There are two main methods for solving simultaneous equations. The first method is the elimination method. This method uses addition or subtraction of the two equations with equal amounts of 'x' or 'y' in or...
WS
Answered by Wei Shi H. • Maths tutor
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(x-4)^3

=(x-4) 2 (x-4)=(x 2 -8x+16)(x-4)=x 3 -4x 2 -8x 2 +32x+16x-64= x 3 -12x 2 +48x-64
PB
Answered by Pavel B. • Maths tutor
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How do I find out the equation of a line?

First of all, we must remember the formula for the equation of a line. This is y=mx+c. It is important to understand what each part of the equation means: - y is the y-coordinate of any point on the line - x...
JB
Answered by Jessica B. • Maths tutor
3398 Views

Find the first derivative of f(x) = tan(x).

First, use the trigonometric identity tan(x) = sin(x) / cos(x) to rewrite the function. It should now be very apparent that f(x) is now actually a ratio of two functions, and therefore the quotient rule will...
HR
Answered by Henry R. • Maths tutor
3937 Views