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The line l is a tangent to the circle x^2 + y^2 = 40 at the point A. A is the point (2, 6). The line l crosses the x-axis at the point P. Work out the area of triangle OAP.

The area of OAP is 60. The missing information I need is to find the x coordinate of point P. To do this I need to find the equation of the tangent. For this I first found the equation of the radius by findi...
KY
Answered by Kai Y. • Maths tutor
5180 Views

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...
ED
Answered by Emily D. • Maths tutor
3710 Views

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 ...
MH
Answered by Maria H. • Maths tutor
5613 Views

Divide 711 in the ratio 4:5

Add 4+5 (which is 9)Tell them to divide 711 by 9 (=79)Multiple 79 by both values (79 x 4):(79 x 5)Answer is 316 : 395Explain that there is a way of finding out if they are correct. This is by adding 316 and ...
AK
Answered by Aini K. • Maths tutor
3551 Views

Solve this simultaneous equation: 2 + 5y = 3x, x + y = 6

step 1 - rearrange equation 2 to make x/y the subject how? example: subtract y from both sidesx = 6 - y step 2 - substitute x = 6 - y into equation 1. how? where x is in the equation put in (6 - y)2 + 5y = 3...
PW
Answered by Phoebe W. • Maths tutor
3392 Views