Steply

Convert 5π/12 to degrees

Step by step, with the reason for every step · Degrees and radians · Trigonometry

Step by step

The question

Question: change 5π/12 to degrees.

1 Write the rule

Radians are another way to measure an angle.

A half turn is 180°.

In radians, a half turn is π.

So π = 180°.

π = 180°

We divide both sides by π.

One radian is 180° over π.

1 radian = 180°π

Careful!

To get degrees, π must cancel.

So π goes at the bottom.

Careful: to degrees: × 180°π

2 Multiply

5π/12 radians is 5π/12 times one radian.

So we multiply by 180° over π.

5π12 = 5π12 × 180°π

π on top and π at the bottom: π over π is 1.

Cross them out.

What is left: 5 × 180° over 12.

5π12 = 5 × 180°12

3 Make it simpler

First 180 divided by 12: 15.

Dividing first keeps the numbers small.

180 ÷ 12 = 15

So it is 5 times 15°.

5π12 = 5 × 15°

So 5π/12 = 75°.

5π12 = 75°

4 Check

Let's check: go back to radians.

Times π over 180.

75 × π180 = 75π180 = 5π12

We get 5π/12 again.

So it is right!

Let's look back.

First: write the rule.

Then: multiply.

Then: make it simpler.

Last: check.

Answer
5π12 = 75°

Your turn

Try this one yourself, then check:

π6 to degrees
Show the answer
π6 = 30°

More from Degrees and radians

The whole lesson: Degrees and radians →