Curated
12| # | Title | Difficulty | Tags | |
|---|---|---|---|---|
| 72 | One identity, many disguisesIdentities | Easy | ||
| 685 | Simplify a quotientIdentities | Easy | ||
| 686 | A difference of fourth powersIdentities | Easy | ||
| 689 | A square minus a double angleIdentities | Easy | ||
| 75 | A product of three sinesProduct identities | Medium | ||
| 78 | Twenty, forty, eightyProduct of sines | Medium | ||
| 120 | A tangent in disguiseIdentities | Medium | ||
| 687 | Sine of seventy-five degreesIdentities | Medium | ||
| 688 | Adding tangentsIdentities | Medium | ||
| 690 | A product of cosinesIdentities | Medium | ||
| 79 | Morrie's lawA telescoping product | Deep | ||
| 80 | The sum of a triangle's sinesInequalities | Deep |
From open sources
373Showing everything, including problems with no answer to check, a missing figure, or a near-copy elsewhere. Show only complete problems
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