117k views
6 votes
What is the reason for step 7 in the proof above?

1 Answer

2 votes
In step 7:BAE, AE=csinB The answer is definition of sine in right triangle. Because, In a right angles triangle, the sine of an angle is equal to the length of the opposite side divided by hypotenuse.
User Roman Plischke
by
5.1k points