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liubo4ka [24]
3 years ago
15

What is 1459 * 569/7+997​

Mathematics
1 answer:
Daniel [21]3 years ago
3 0

Answer:

837150 /7

Step-by-step explanation:

459( 569 /7 )+997

=

830171 /7 +997

=

837150 /7

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The answers in my textbook show that using Soh Cah Toa is not right. Unless I'm doing it wrong. Can someone help me please?
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Answer:

(a) α = 60°, β = 30°

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Step-by-step explanation:

I'll do (a) and (b) as examples.  Make sure your calculator is set to degrees, not radians.

(a) For α, we're given the opposite and adjacent sides, so use tangent.

tangent = opposite / adjacent

tan α = √300 / 10

tan α = √3

α = 60°

Since angles of a triangle add up to 180°, we know that β = 30°.  But we can use tangent again to prove it:

tan β = 10 / √300

tan β = 1 / √3

tan β = √3 / 3

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(b) For α, we're given the adjacent side and the hypotenuse.  So use cosine.

cos α = adjacent / hypotenuse

cos α = 15 / 39

cos α = 5 / 13

α ≈ 67.4°

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sin β = 15 / 39

sin β = 5 / 13

β ≈ 22.6°

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Here, there are 64 cubes with 1/4 units side lengths in 1 cubic unit.

Since the rectangular prism is made up of 3 cubic units, we would have

3 * 64  total cubes with 1/4 units side lengths.

3*64=192

Therefore, it takes 192 of the 1/4 unit cubes to fill the prism.

~

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Step-by-step explanation:

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