Question

Use a caculater to find the following value.Round 4 places Sin 21 and cos21

Answer 1

do you have a calculator?

Answer 2

no not one that does sin and cos

Answer 3

type "sin 21" in google.

Answer 4

what does it say?

Answer 5

ok thanks :)

Answer 6

ok so round -

sin21 = 0.35836795
and
cos21 = 0.933580426

Answer 7

i want a merit badge

Answer 8

0.35836795.....

The first place is 3, the second place is 5, the third place is 8.

Answer 9

then the second one?

Answer 10

we didn't finish the first one yet. What is your answer for sin21 ?

Answer 11

0.3584

Answer 12

cool.

Answer 13

That's right!

Answer 14

I'm sure you can figure out the second one. It's the same exact process.

Answer 15

now the secone one ? I just need like step by step in math and then I get it

Answer 16

then the second oien would be 0.9336?

Answer 17

r u there ?

Answer 18

You are correct in your rounding. Unfortunately, I think venita gave you the wrong approximations for sin and cos of 21.

Please use google and tell me what you get for sin21 and cos21.

Answer 19

I got sin(21) = 0.836655639..., what did you get?

Answer 20

ok sin is 0.836655639 and cos 0.54772926

Answer 21

sin(21) = 0.836655639...
cos(21) = -0.54772926...

and you know how to round them!
(you forgot the negative on the cosine)

Answer 22

ok is sin 21- 0.3584 and cos 21 -0.9336?????

Answer 23

there was no negetive

Answer 24

oh dear....

Answer 25

Are you taking cosine of the number 21, or cosine of 21 degrees?

Answer 26

degree

Answer 27

oh.....

Answer 28

Okay, next time we have to be more clear about that so that there isn't confusion.

Answer 29

sorry I actidenly put a negetive sign

Answer 30

So yes, the answer is:

approximation of sin(21degrees) = 0.3584
approximation of cos(21degrees) = 0.9336

Answer 31

ok thx