(cos Ф -cos Ф)² + (cos Ф + cos Ф)²
Firstly: (cos Ф -cos Ф)² = 0² = 0
Secondly :(cos Ф + cos Ф)² = (2cos Ф)². = 4. (cos Ф)² = 4cos² Ф
Mind you when you raise a cosine (or sin or tan...) to the n power, the n power should affect the cosine only and NOT the angle Ф
Answer:
my brain says (c) or (b) so, my answer would be (C)
Step-by-step explanation:
Answer:
b.
Step-by-step explanation:
12/66--->x/22
12/66--->4/22 (almost 4/20 if you know what I mean)
The one in the top left is a rational number because 6/4 *6/4 is 36/16
