One Question, One Answer

You'll learnwhy each inverse trig function hands back exactly one angle, and which one.

Draw the line y = 1/2 across a sine wave and the crossings keep coming, forever. A function may hand back only one of them, so sine gets cut down to a single climb and folded across y = x. Twelve short steps; press Next for each one.

12 STEPS · 6 QUICK CHECKS · RESTRICT · REFLECT · ONE ANGLE OUT · v3

many correct angles · one contract · one answer

Before you start

What you're looking at

A sine wave with the flat line y = 1/2 drawn across it.

The question

Many angles have sine 1/2, so which one should a function hand back?

Step 1 / 8