You can use the cosine rule for this - you might have to change some of the letters around for it to make sense though. Hope this helps!
Answer:
900
Step-by-step explanation:
(n-2)*180
5*180=900
<span>4x +5=9x-2
9x - 4x = 5 + 2
5x = 7
x = 7/5
x = 1.4</span>
Kindly refer to attachment for solution.
Hope it helps ^_^
Answer:
no they are not reciprocal
Step-by-step explanation:
an example is the reciprocal of 2 would be 1/2