Question

Find the measure of angle x. Round your answer to the nearest hundredth.

Answer 1

i know the missing side is 5 where do i go from there?

Answer 2

With respect to angle x,
the side labelled 12 is the 'adjacent side
the side labelled 13 is the hypotenuse

you can use sin, cos or tan to solve questions lik ethis

which of those 3 options uses adjacent/hypotenuse?

Answer 3

cos

Answer 4

ok

so write
cos x = adj /hyp

and put in the numbers

Answer 5

so it would be co x = 5/12?

Answer 6

no

it's adjacent /hyp

the side labelled 12 is the 'adjacent side
the side labelled 13 is the hypotenuse

Answer 7

ooohhh ok so cos x = 12/13

Answer 8

correct

now use a calculator to get x

Answer 9

I know I have to do 13 cos x =12 where do I go now?

Answer 10

no

you have cos x = 12/13

so work out 12/13

then that number is the value of cos (x)

your calculator then will have 'inverse cos' or ' arc cos' or 'cos ^-1'
that function is the opposite of finding the cos of an angle - it fids the angle whose cos is 12/13

Answer 11

sorry this is the hardest part of geometry for me. I have cos (x) = .923076923076923 so just divide that by arc cos and im done?

Answer 12

no - it is not a division

the arc cos is a function once you have the number then press arcos

DONT forget to round to nearest 100th as asked by question

Answer 13

suppose oyu have a number 60on your calculator
when you press the cos button it works out cos 60 (and show 0.5 = cos 60)

if you then press ARC cos it will tell you then angle whose cos is 0.5 i.e. 60

arc cos or cos^-1 is the OPPOSITE of finding the cos - it tells oyu the ANGLE

Answer 14

i got 22.61 is that correcT?

Answer 15

Did you ROUND the answer properly?

Answer 16

so 22.60?

Answer 17

what was the first 5 numbers in the answer on your calculator

Answer 18

22.619

Answer 19

i got it now 22.62

Answer 20

ok - well done

Answer 21

thanks for the help!! I actually understand this now!

Answer 22

good - that is MUCH better than just getting ht e answer