Factor each completely.if non-factorable, write"non-factorable".

1 answer:

8 0

(k+4) (k-4) the numbers have to multiply up to what ever the number is. so the number is 16 and 4 times 4 is 16. also a pluss and minus makes it into a negative number like the equation

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1-2 sin e cos 20-2 sin 40 = cos (20)

natka813 [3]

Answer:

No this is not the same as cos(2Ф)

Step-by-step explanation:

First I changed the $cos^{2}$ Ф into 1- $sin^{2}$ Ф

I then foiled the (1-2 $sin^{2}$ Ф)(1- $sin^{2}$ Ф) and that resulted in 1- $sin^{2}$ Ф-2 $sin^{2}$ Ф+2 $sin^{4}$ Ф

From there, I then cancelled the two 2 $sin^{4}$ Ф and combined like terms and was left with 1-3 $sin^{2}$ Ф

Now 1-3 $sin^{2}$ Ф ≠ cos(2Ф)

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4 years ago

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Schach [20]

Answer:

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Step-by-step explanation:

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