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Gre4nikov [31]
3 years ago
7

If sin x = 0.5 what is the value of cos X?round the value to the nearest thousandth

Mathematics
2 answers:
Mariana [72]3 years ago
8 0
Cos(arcsin(0.5)) = 0.866
Roman55 [17]3 years ago
6 0
Use the inverse button on your calculator in degree mode for this.  Inverse sin of .5 gives you an x value of 30 (30 degree angle, that is).  Now find the cos(30) and round.  cos(30) = .866
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Carlos wants to practice piano 2 hours each day. He practices piano for 3/4 hour before school and 7/10 hour when he gets home.
kiruha [24]

Answer

Find out the how many hours has Carlos practiced piano .

To prove

As given

He\ practices\ piano\ for\ \frac{3}{4}\ hour\ before\ school.

\frac{7}{10}\ hour\ when\ he\ gets\ home.

Than

Total\ hours\ carlos\ practiced\ piano = \frac{3}{4} + \frac{7}{10}

L.C.M of (4,10) = 20

Total\ hours\ carlos\ practiced\ piano = \frac{3\times 5+7\times 2}{20}

Total\ hours\ carlos\ practiced\ piano = \frac{15+14}{20}

Total\ hours\ carlos\ practiced\ piano = \frac{29}{20}\ hours

Therefore the total hours Carlos practiced piano is 1.45 hours .

4 0
3 years ago
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slamgirl [31]

Answer:

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Step-by-step explanation:

so they get paid 175 in total for two days so 24 hours are in one day but we are looking for the hourly pay for two days so we use 48 as a dividing variable . so 175 divide by 48 is 3.65 so they get paid 3.65 per hour but if we have to round it out then 4 per hour

6 0
3 years ago
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What is tooth plapue​
Illusion [34]

Answer:

It is a cavity.

Step-by-step explanation:

If it is not treated well you may feel pain in your gum.

6 0
2 years ago
what is an equation of the line that s perpendicullar to y-3=-4(x+2) and passes through the point (-5,7)
Sidana [21]

Answer:

4y=x+33

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Step-by-step explanation:

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For perpendicularity

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The equation is

y-y1 = m2(x-x1)

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y-7 = x/4+5/4

Multiply through by 4

4y-28=x+5

4y=x+5+28

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Divide through by 4

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7 0
3 years ago
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natulia [17]

Answer:

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6 0
3 years ago
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