Question

Whats 120 cos 15?/:

Answer 1

12

Answer 2

thank you :)

Answer 3

welcome

Answer 4

@ganeshie8 Help?

Answer 5

il give a hint, see if it helps :)

Answer 6

15 = 45-30

Answer 7

hmmm?

Answer 8

its equal?

Answer 9

@ganeshie8 you look so much like your mom in that picture

Answer 10

\(120 \cos (15)\)

Answer 11

\(120 \cos (45 - 30)\)

Answer 12

69

Answer 13

use the cosine difference formula

Answer 14

\(\cos(A-B) = \cos A \cos B + \sin A \sin B\)

Answer 15

Okay let me see

Answer 16

is it -7.5?

Answer 17

A biker rides on an upward-sloped road inclined at a 15.0° angle with the horizontal. If he moves at a constant speed of 2.0 meters/second for 60 seconds, what is the magnitude of his horizontal displacement?

Thats my problem?

Answer 18

im lost...

Answer 19

oh I see... you're right ! horizontal displacement = 120 cos 15

Answer 20

you dont wanto use calculator is it ?

Answer 21

but none of my answers match/:

Answer 22

wait what? sorry

Answer 23

list your options, we will see

Answer 24

A. 3 meters
B. 116 meters
C. 60 meters
D. 130 meters

Answer 25

im getting the answer as 116 meters.

Answer 26

you're not allowed to use calculator to solve this is it ?

Answer 27

if calculator is allowed, u can use wolfram directly :

http://www.wolframalpha.com/input/?i=120cos%2815%29

Answer 28

we can but they didnt give me one..

Answer 29

click the wolfram link. you can use it as calculator

Answer 30

Thank you soo much :)

Answer 31

np :) if you wanto derive cos(15) you can do that as well using the formula i gave above.... good luck :)