Samin can run 5 kilometers in 30 minutes. Assuming she keeps a constant pace, how many kilometers can she run in 45 minutes? URG
2 answers:
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Answer:
No this is not the same as cos(2Ф)
Step-by-step explanation:
First I changed the Ф into 1-
Ф
I then foiled the (1-2Ф)(1-
Ф) and that resulted in 1-
Ф-2
Ф+2
Ф
From there, I then cancelled the two 2Ф and combined like terms and was left with 1-3
Ф
Now 1-3Ф ≠ cos(2Ф)
