Question

Find the measure of a.

Answer 1

Is this sin again ?

Answer 2

is angle C a right angle ?

Answer 3

i would say yes

Answer 4

is it given ??
because if its not, you will need to use cosine rule
(if you have choices, post them)

Answer 5

A. 3
B. 6
C. 8
D. 16

Answer 6

and angle c is not given

Answer 7

then use cosine rule

\(\large a^2=c^2+b^2-2cb\cos \theta\)

Answer 8

here, b = 8
c=11
theta = 32.2 degrees,
just plug in!

Answer 9

cos 32.2= .846

Answer 10

correct.

Answer 11

c^2+b^2=185
185-2cb cos ?

Answer 12

is that 185 - 2*11*8*.846 ?

Answer 13

yes
what does that equal ?

Answer 14

36.104

Answer 15

yes! rounding it off to 36
\(a^2=36\)
so a = ... ?

Answer 16

6

Answer 17

correct :)

Answer 18

thank you! :)