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How do I integrate cos^2x with respect to x?

This can be a very tricky question if you do not know how to approach it. Our first instinct may be to try a substitution, but this gets us nowhere. In fact, the trick is to make use of the identity cos2x = ...
RS
Answered by Raiad S. • Maths tutor
14424 Views

Point P on the curve, x = 2tan( y+ π/12), has a y-coordinate of π/4. Find an equation for the normal to the curve at P.

Step 1 - Firstly, we need to find the x-coordinate of point P. This will allow us to find the normal equation required in the question. To find the x-coordinate, we plug in the value of y given in the questi...
AM
Answered by Andrew M. • Maths tutor
11111 Views

The point (-3, -4) is the turning point of the graph of y = x^2 + ax + b, where a and b are integers. Find the values of a and b.

The function y = x 2 + ax + b is a quadratic polynomial and therefore has one turning point. The turning point of a quadratic graph is either the maximum or minimum point. The coefficient of x 2 is equal to ...
OL
Answered by Oliver L. • Maths tutor
16557 Views

Integrate sin^2(x)

sin^2(x) is not one of the functions whose antiderivative is commonly known to us. When we see trigonometric functions our best bet is usually to think of some trigonometric identity we know. In this case we...
JP
Answered by John P. • Maths tutor
38706 Views

A circle with center C has equation x^2 + y^2 + 8x - 12y = 12

Circle equation = (x - a) 2 + (y - b) 2 = r 2 Where Centre coordinates (a, b) and radius 'r'Therefore x 2 + y 2 + 8x - 12y = 12 is to be rewritten in this formComplete the square to find a and bThis gives(x+...
HK
Answered by Henry K. • Maths tutor
9689 Views