Pythagorean and Basic Trigonometric Identities
30 tutor-authored questions for this Ontario curriculum expectation, ordered easiest to hardest, every one with a full worked solution. Work through all 30 with your weekly-lesson access code.
Sample: the first question, solved
Which equation is the primary Pythagorean identity?
📘 Worked solution
✓It comes directly from the unit circle definition of sine and cosine: sin²(θ)+cos²(θ)=1.
And one from the hard end
"Given cos(θ)=−5/13, θ in Quadrant III, find sin(θ), tan(θ), and verify sin²+cos²=1."
Solution shown after you try it in practice mode.
Work through all 30, easiest to hardest
Your Winny Score tracks you as the questions ramp up. Stuck on one? A real Winny Math tutor will walk you through it. First lesson free.
Start practicing