The unit circle.............is used to make the trig functions............

4 - 3.1415 =

0.8585

You can search for any mathematical expression, using functions such as: sin, cos, sqrt, etc. You can find a complete list of functions here.

Rad

Deg

x!

Inv

sin sin⁻¹

ln e^x

π

cos cos⁻¹

log 10^x

e

tan tan⁻¹

√ x²

Ans Rnd

EXP

x^{y y}√x

(

)

%

AC CE

7

8

9

÷

4

5

6

×

1

2

3

−

0

.

=

+

More info

Pi - Wikipedia

https://en.wikipedia.org/wiki/Pi

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The number π is a mathematical constant. Originally defined as the ratio of a circle's circumference to its diameter, it now has various equivalent definitions and appears in many formulas in all areas of