Notice that both A and B are multiplied by (1/2).
Thus, the given expression can be re-written as [(1/2)(A+B)]^2.
Square the (1/2) and the (A+B) separately, and then multiply together the resulting squares:
(1/4)(A^2 + 2AB + B^2)
Answer:
1. acute angle, 2.right angle, 3.obtuse angle
Step-by-step explanation:
Answer:
9x2+5x
Step-by-step explanation:
combine like terms
Answer:


Step-by-step explanation:
In the triangle we have the following trigonometric equations:

and also:
