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o-na [289]
4 years ago
5

Given that cos (x) = 1/3, find sin (90 - x)

Mathematics
2 answers:
AysviL [449]4 years ago
7 0
A/c to trigonometric relations, sin(90 - x) = cos(x),
that means sin(90 - x) = cos(x) = 1/3.
ddd [48]4 years ago
3 0

Answer:

\sin(90^{\circ} - x)=\frac{1}{3}

Step-by-step explanation:

Given: \cos (x)=\frac{1}{3}

We have to find the value of \sin(90^{\circ} - x)

Since Given \cos (x)=\frac{1}{3}

Using trigonometric identity,

\sin(90^{\circ} - \theta)=\cos\theta

Thus, for  \sin(90^{\circ} - x) comparing , we have,

\theta=x

We get,

\sin(90^{\circ} - x)=\cos x=\frac{1}{3}

Thus, \sin(90^{\circ} - x)=\frac{1}{3}

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Lisa needs 250 yards of yarn to knit a hat. She has 185 yards of yarn and needs to buy the rest. How many yards of yarn does she
Alecsey [184]

Answer:

it's answer is y + 185 = 250; y = 65

hope it helps you

6 0
3 years ago
Tim is investigating the relationship between the number of years since a tree was planted and the height of the tree in feet. H
wolverine [178]

Answer: There is not a good prediction for the height of the tree when it is 100 years old because the prediction given by the trend line produced by the regression calculator probably is not valid that far in the future.

Step-by-step explanation:

Years since tree was planted (x) - - - - height (y)

2 - - - - 17

3 - - - - 25

5 - - - 42

6 - - - - 47

7 - - - 54

9 - - - 69

Using a regression calculator :

The height of tree can be modeled by the equation : ŷ = 7.36X + 3.08

With y being the predicted variable; 7.36 being the slope and 3.08 as the intercept.

X is the independent variable which is used in calculating the value of y.

Predicted height when years since tree was planted(x) = 100

ŷ = 7.36X + 3.08

ŷ = 7.36(100) + 3.08

y = 736 + 3.08

y = 739.08

Forward prediction of 100 years produced by the trendline would probably give an invalid value because the trendline only models a range of 9 years prediction. However, a linear regression equation isn't the best for making prediction that far in into the future.

3 0
4 years ago
Plz make the graph <br>(WILL MARK THE BEST ONE AS BRAINILIST)​
Natalija [7]

Answer:

x and y

Step-by-step explanation:

5 0
4 years ago
Read 2 more answers
The total weight of a rock depends on its size and is proportional to its density. In this context, density is the weight per cu
kow [346]

Answer:

d = \frac{w}{48}

If  \frac{1}{48} \\ is constant, say k

Then,

d = kw

∴ d ∝ w

Hence, weight is proportional to the density

Step-by-step explanation:

From the question,

Let w denote the weight of the rock in pounds

s denote the size of the rock in cubic inches and

d denote the density of the rock in pounds per cubic inch.

First, we will write the equation connecting w, s, and d.

We get

density (pounds/inch^{3} ) = \frac{weight(pounds)}{size (inch^{3}) }

That is,

d = \frac{w}{s}

Now, given a 48-cubic-inch rock with weight w pounds, to show the proportional relation between the weight and the density, we will write

d = \frac{w}{48}

If  \frac{1}{48} \\ is constant, say k

Then,

d = kw

∴ d ∝ w

Hence, density is proportional to the weight OR weight is proportional to the density

4 0
3 years ago
Melinda’s heart beats 15 times during 1/6 of a minute at that rate how many times does a heartbeat each minute
Elena L [17]
Ok so obvi you can’t multiply 1/6 so u have to divide top on bottom out so 1 divided by 6 so your awnser would be 2.5
7 0
3 years ago
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