Using complementary angles, it is found that F = 47º.
What are complementary angles?
Two angles are complementary if the sum of their measures is of 90º.
If two angles A and B are complementary, the sine of one angle is the cosine of the other.
In this problem, 43º and 47º are complementary, hence:
sin 43º = cos 47º, which means that F = 47º.
More can be learned about complementary angles at https://brainly.com/question/11161460
