Originally Posted by
PhilC Working with a right angled triangle ABC with C as the right angle;
If A = x and B = x^2
What are the values of A and B?
Also,
If A = x and B = 1/x
What are the values of A and B?
Obviously
A + B + 90 = 180
So A + B = 90
So
x + x^2 = 90
and
x + 1/x = 90
The book I am working with has the answers in the back, so I know the answers, but I don't understand how the answers were arrived at.
I can work out x + 2x = 90
3x = 90
x = 90/3
x = 30
2x = 60
But I don't know the way to do the same with the reciprocal and the square:
x + 1/x = 90
1/x = 90 - x which cannot be right.