A^2 = b^2 + c^2 - 2bc cos a
= 11^2 + 5^2 - 2*5*11 cos 40
= 7.86 to 2 DP's
to find the remaining angles use the sine rule:-
a / sin A = b / sin B so
7.857/ sin 40 = 11 / sin B
sin B = 11 sin40 / 7.857 = 0.8999
<B = 64 degrees
so <C = 180 - 64-40 = 76 degrees
Answer:
$1
Step-by-step explanation:
because there is more odd numbers then even

is the only acute angle whose sin = 1/2. Therefore, cos (

) =
Answer:
12x
Step-by-step explanation:
4x+2x+4x+2x=12x
Step-by-step explanation:
I don't know if this helps but there is an app call symbols which is free which maybe it can help you to grapgh.