Question 1135553

In ∆ABC, b=5 and c=4. The area of the triangle is 15√7/4. To the nearest tenth,
calculate a and m < A (in degrees). 
a = 15√7/4 = 9.92157
A =?
<pre>You can use the formula for the area of a non-right triangle, with 2 (two) sides and the angle between them, known. This is: {{{matrix(1,3, Area, "=", (1/2)bc * Sin (A))}}}
Furthermore, you might notice that the formula contains 4 variables, with all but one, given.
Angle A is between sides b and c.