(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:
2/5
Step-by-step explanation:
2 cups of lemon juice to 5 cups of water.
This is the "commutative property of addition." The order in which you add numbers together doesn't matter, and doesn't change your final results.
