Question

~*~*~will fan and medal~*~*~ HELP!!
find measure C. (image below) Round the answer to the nearest tenth.

Answer 1

@SolomonZelman

Answer 2

hi

Answer 3

hello

Answer 4

need help

Answer 5

yes i do..

Answer 6

ok

Answer 7

use the Cosine rule
cos C = a^2 + b^2 - c^2
--------------
2ab

Answer 8

(the side c is opposite < C , a oppositse <A and b is opposite angle B)

Answer 9

i got 260 over 762? @welshfella

Answer 10

for cos C?

Answer 11

2.93 ... ? i am confused

Answer 12

cos C = (12.5^2 + 15^2 - 11^2) / (2*12.5*15)

Answer 13

okay.. 248 / 375 ?

Answer 14

@welshfella i do not think that is right

Answer 15

no its not
it should be 260.25 / (2*12.5* 15

what do you get that?

Answer 16

sorry, first thing in the morning, takes a minuet to process. but 260.25 / 375 ??

Answer 17

yea

Answer 18

and cos would be .99968 which isnt an answer

Answer 19

so to find angle C use cos-1 on your calculator.

Answer 20

it says error when i try

Answer 21

260.25 / 375 = 0.694

you need cos-1 0.694
- have you set ur calculatoe to degrees?

Answer 22

i just dide and the answer is 46.0524!! thank you @welshfella

Answer 23

yes yw