Here is your answer :-D....
Cos Ф - cos Ф.sin² Ф
sin² Ф = 1 - cos² Ф
cos Ф - cos Ф( 1-cos² Ф) = cos Ф - cos Ф - cos³ Ф = cos³ Ф
cos Ф - cos Ф.sin² Ф = cos³ Ф
What this question I did not get
Answer:
13 ounces
Step-by-step explanation:
291/21.5=13.5348837209
Because his friends are not representative. If he would want to receive information about his friends, then this would be a good sample, however, considering that Mason probably wants data that are more representative, it would be better for him to gather info from his school or even wider. This would help him get better data for what he wanted to find information about :)