Legs with "B" in their title can not be opposite to the angle B, as they are touching it. So...
The opposite leg to the angle B is the leg AC.
120 degrees the sum of all is 720
Answer:
a)
,
,
,
, b)
,
,
, 
Step-by-step explanation:
a) The equation must be rearranged into a form with one fundamental trigonometric function first:





Value of x is contained in the following sets of solutions:
, 
, 
b) The equation must be simplified first:




Value of x is contained in the following sets of solutions:
, 
, 