Question

I got the top value of three but can you help me with the bottom

Answer 1

Given -

To Find -

Value of x =?

Step-by-Step Explanation -

We know, the equation of a circle centered at the origin is

x² + y² = r²

Here, r = 1

So,

x² + y² = 1²

x² + y² = 1

Here, Put the coordinates (x, 4/5) in the above equation:

x² + (4/5)² = 1

25x² + 16 = 25

25x² = 25 - 16

25x² = 9

x² = 9/25

x = √(9/25)

On removing square root

x = 3/5 or x = -3/5

Final Answer -

x = -3/5