Applications Combining the Sine Law and 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
A triangle gives you two sides and the INCLUDED angle between them (SAS). Which law do you use first to find the third side?
📘 Worked solution
✓SAS is exactly what the cosine law is built to solve - you don't yet have a matched angle-side pair for the sine law.
And one from the hard end
"A boat sails 15km, then 20km more, with a 130° angle between the two legs. Find the direct distance back to start using the cosine law, then the angle at the starting point using the sine law."
Solution shown after you try it in practice mode.
Work through all 30, easiest to hardest
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