Here's the question you clicked on:
Anyssah
find the value of e
A. 17.2 B. 12.7 C. 19.4 D. 14.9
sin 61 / e = sin 45 / 15.7
I can see that you haven't learnt or you don't understand the sine/cos and other rules that apply to non-right angled triangles. You need to learn them first.
45+61+angle R=180 angle R=74 and side e = 15.7 cos 74 = 15.7 *.87=14.134