- #1

cscott

- 782

- 1

How can I work out exact values for trig functions like sin(30) and cos(3pi/2)?

You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter cscott
- Start date

- #1

cscott

- 782

- 1

How can I work out exact values for trig functions like sin(30) and cos(3pi/2)?

- #2

hypermorphism

- 506

- 1

- #3

Jameson

Gold Member

MHB

- 4,538

- 13

cscott said:How can I work out exact values for trig functions like sin(30) and cos(3pi/2)?

Like the decimal values? Without a calculator?

I would just draw out the triangle and leave the answer in the exact radical form, like in your first example. But [itex]\cos{\frac{3\pi}{2}}[/itex] is 0 so that should be easy.

- #4

cscott

- 782

- 1

Ah thanks.

Share:

- Replies
- 9

- Views
- 442

- Replies
- 12

- Views
- 620

- Replies
- 3

- Views
- 449

- Replies
- 5

- Views
- 344

- Replies
- 7

- Views
- 257

- Last Post

- Replies
- 6

- Views
- 290

- Replies
- 12

- Views
- 575

- Last Post

- Replies
- 4

- Views
- 356

- Replies
- 6

- Views
- 256

- Replies
- 13

- Views
- 451