Question

cos² A +cos² B - cos²
C
= 1- 2sinA sinB cosC​

Answer 1

Answer:

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Answer 2

Answer:

cos2 A

Step-by-step explanation:

cos2 A = sin 90. dogs thgsu gudht dub step remix to ignition and I have to do that to you and you can get it done by the way to go to now baby I love it when you get the for a while ago I