Trigonometric ratios in a circle of radius r
For the questions below, be sure to zoom out if you need to!
Question 1
Suppose P(x,y) = any point that lies on a circle with center (0,0) and radius r, where r > 0. Use what you've observed to write an equation that expresses the relationship among trigonometric ratios and x, y, and r: a) In QI
Question 2 (answer on your copybook)
Deduce the remaining trigonometric ratios in QI, (secant, cosecant, cotangent of an angle)