## infinitemoes 2 years ago what is the radian measure of an angle whose sine is 0.8?

1. primeralph

2. primeralph

if it's not in rad, multiply the arcsin by 180/pi

3. primeralph

(I like girls with smiles)

4. primeralph

Got it?

5. infinitemoes

Yes! Thank you very much. So, it says to find the radian measure of tangent -.25 now. Do I put in tan -.25 eeeerrr, am I doing this completely wrong? haha

6. infinitemoes

Sorry, I'm a lost one when it comes to trig.

7. primeralph

I got 3 questions: do you have a calculator? has anyone told you how pretty you are? what kind of calculator is it?

8. infinitemoes

no. I've been getting by on a calc on my computer this entire year. haha and thank you!

9. primeralph

okay, you're using windows?

10. infinitemoes

yes.

11. primeralph

type -.25, then click on the button that says "inv", then you'll see "tan-1" where "tan" used to be. Click that and you have an answer.

12. primeralph

got it?

13. infinitemoes

yup, thank you!

14. sfozturk61

$\arcsin(0.8)=53,130102354$ $x=53,130\pi/180$ $x=0.295$