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sertanlavr [38]
3 years ago
9

The theoretical time for an apple to drop 2 meter is 0.64 second.sam did the experiment himself and measured that it took 0.62 s

econd for him. What is the percent error?
Mathematics
1 answer:
nikitadnepr [17]3 years ago
4 0
0.02/0.64*100=3.125℅
The formula is:(/error/divided by right answer) times 100. /means absolute value
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Answer:

So 67 degrees is one value that we can take the sine of such that is equal to cos(23 degrees).

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Step-by-step explanation:

You can use a co-function identity.

The co-function of sine is cosine just like the co-function of cosine is sine.

Notice that cosine is co-(sine).

Anyways co-functions have this identity:

\cos(90^\circ-x)=\sin(x)

or

\sin(90^\circ-x)=\cos(x)

You can prove those drawing a right triangle.

I drew a triangle in my picture just so I can have something to reference proving both of the identities I just wrote:

The sum of the angles is 180.

So 90+x+(missing angle)=180.

Let's solve for the missing angle.

Subtract 90 on both sides:

x+(missing angle)=90

Subtract x on both sides:

(missing angle)=90-x.

So the missing angle has measurement (90-x).

So cos(90-x)=a/c

and sin(x)=a/c.

Since cos(90-x) and sin(x) have the same value of a/c, then one can conclude that cos(90-x)=sin(x).

We can do this also for cos(x) and sin(90-x).

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This means sin(90-x)=cos(x).

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cos(23)=sin(90-23)

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So 67 degrees is one value that we can take the sine of such that is equal to cos(23 degrees).

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