Ok sweetie so the pentagon is the shape of a house like the first picture and quadrilateral shapes are these on the second file attached to this answer
hope i helped in any shape or form so... have a great day and goodluck on you thing
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-2Ф+2Ф
From there, I then cancelled the two 2Ф and combined like terms and was left with 1-3Ф
Now 1-3Ф ≠ cos(2Ф)
I believe the answer would be 168