Question

How am i suppose to answer this?? it tells me to find the derivative of f'(0) if f(x)= sin x with x in degrees??? what is it asking for? (the answer is rounded to four decimal places )

Answer 1

i also tried putting 2pi in decimal for as the answer but i got it wrong , i only have 1 try left, pleasae explain it to me

Answer 2

the answers i got that were wrong are 6.2832, 0.7308 ,and 0.9983

Answer 3

here is a hint that was given after 3 tries

Answer 4

Alrighty, so first, what is the derivative of sinx?

Answer 5

@skullofreak

Answer 6

Are you using a TI-83 or -84 calculator, by any chance?

Answer 7

@fibonaccichick666: skullofreak is apparently offline.

Answer 8

....ugh hate that...

Answer 9

Same here. thanks for your many contributions. Over and out!

Answer 10

sorry, i had to go to class! there derivative of sin(x) is cos(x)

Answer 11

so now, at x=0 what is the value of the derivative?

Answer 12

hmm isnt it 0?

Answer 13

no... this is something you have to memorize so google it

Answer 14

oh wait like on the graph of cos x? when x=0?

Answer 15

ok

Answer 16

and then commit it to eternal memory

Answer 17

but yes f'(0)=cos(0) that's just terminology

Answer 18

at x=0 its 1

Answer 19

so the answer is?

Answer 20

1?

Answer 21

yup

Answer 22

now why

Answer 23

but it asks for a decimal answer?

Answer 24

1.000 that is a 'decimal' answer

Answer 25

just a simplified one

Answer 26

basically they said it to throw people off

Answer 27

thats my problem :( cause it says x is in degrees?

Answer 28

oh !

Answer 29

that doesn't matter

Answer 30

wow thank you!

Answer 31

np so yea, it was just asking for the value of the derivative at x=0 or written as the value of f'(0) they mean the same thing