Answer:
93 degrees
Step-by-step explanation:
Because there is no length opposite A we must work out angle C first to then work out angle A using the sine rule.
SinA/a = SinB/b
Sina/11 = Sin38/9
multiply both sides by 11
sina = 11sin38/9
press shift on your calculator because we are finding an angle
sin-1 = (11sin38/9)
MAKE SURE YOU CLOSE ALL THE BRACKETS
this should give you 48.8
38+48.8 = 86.8
all angles in a triangle add up to 180 therefore
180-86.8 = 93.2
rounds to 93 degrees , this is angle A
