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olga55 [171]
2 years ago
7

Simplifyanswer itb)​

Mathematics
2 answers:
exis [7]2 years ago
3 0

Answer:

a) 8x + 5x = 13x

b) 9f + 10f - 12f = 7f

Step-by-step explanation:

For part b, just solve from left to right normally, since adding and subtracting are inverse operations. (Inverse operation; meaning they are opposites of each other.)

So 9 + 10 = 19, and 19 - 12 = 7.

Hope this helps you :)

Artist 52 [7]2 years ago
3 0

Step-by-step explanation:

(a) 8x + 5x = 13x....simplified

(b) 9f + 10f - 12f = 7f.....simplified

<h3>Hope it helps you! </h3>

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Answer:

See below

Step-by-step explanation:

We want to prove that

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Taking the RHS, note

\dfrac{1}{\cos(x)} - \cos(x) = \dfrac{1}{\cos(x)} - \dfrac{\cos(x) \cos(x)}{\cos(x)} = \dfrac{1-\cos^2(x)}{\cos(x)}

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3 years ago
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Step-by-step explanation:

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