Cosine Law
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
In the formula a² = b² + c² − 2bc·cos(A), which angle does the "A" refer to?
📘 Worked solution
✓It's the angle opposite side a - the cosine law always pairs the squared side on the left with the angle across from it on the right.
And one from the hard end
"A hiker walks 8km east, then 6km on a path making a 110° angle with the original path. Find the direct distance back to the start."
Solution shown after you try it in practice mode.
Work through all 30, easiest to hardest
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