Proving Trigonometric Identities
10 tutor-authored questions for this Ontario curriculum expectation, ordered easiest to hardest — every one with a full worked solution. Work through them free, no account needed.
Sample: the first question, solved
Which reciprocal identity directly proves cot(θ)=cos(θ)/sin(θ)?
📘 Worked solution
✓By definition cot(θ)=1/tan(θ)=1/(sin(θ)/cos(θ))=cos(θ)/sin(θ), so it follows directly from the definition of tangent.
And one from the hard end
Prove 1+tan²θ=sec²θ starting from the left side.
Solution shown after you try it in practice mode.
Work through all 10, easiest to hardest
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