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boyakko [2]
3 years ago
13

Thank you. please answer asap!​

Mathematics
2 answers:
PSYCHO15rus [73]3 years ago
6 0

Answer:

96 i think

Step-by-step explanation:

777dan777 [17]3 years ago
6 0

I think its 96. just multiply all the sides

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If sin theta = (4)/(7)​, theta in quadrant​ II, find the exact value of (a) cos theta (b) sin (theta + (pi) / (6) ) (c) cos (the
EleoNora [17]

Answer:

a) \cos(\theta) = \frac{\sqrt[]{33}}{7}

b) \sin(\theta + \frac{\pi}{6})\frac{-3\sqrt[]{11}+4}{14}

c) \cos(\theta-\pi)=\frac{\sqrt[]{33}}{7}

d)\tan(\theta + \frac{\pi}{4}) = \frac{\frac{-4}{\sqrt[]{33}}+1}{1+\frac{4}{\sqrt[]{33}}}

Step-by-step explanation:

We will use the following trigonometric identities

\sin(\alpha+\beta) = \sin(\alpha)\cos(\beta)+\cos(\alpha)\sin(\beta)

\cos(\alpha+\beta) = \cos(\alpha)\cos(\beta)-\sin(\alpha)\sin(\beta)\tan(\alpha+\beta) = \frac{\tan(\alpha)+\tan(\beta)}{1-\tan(\alpha)\tan(\beta)}.

Recall that given a right triangle, the sin(theta) is defined by opposite side/hypotenuse. Since we know that the angle is in quadrant 2, we know that x should be a negative number. We will use pythagoras theorem to find out the value of x. We have that

x^2+4^2 = 7 ^2

which implies that x=-\sqrt[]{49-16} = -\sqrt[]{33}. Recall that cos(theta) is defined by adjacent side/hypotenuse. So, we know that the hypotenuse is 7, then

\cos(\theta) = \frac{-\sqrt[]{33}}{7}

b)Recall that \sin(\frac{\pi}{6}) =\frac{1}{2} , \cos(\frac{\pi}{6}) = \frac{\sqrt[]{3}}{2}, then using the identity from above, we have that

\sin(\theta + \frac{\pi}{6}) = \sin(\theta)\cos(\frac{\pi}{6})+\cos(\alpha)\sin(\frac{\pi}{6}) = \frac{4}{7}\frac{1}{2}-\frac{\sqrt[]{33}}{7}\frac{\sqrt[]{3}}{2} = \frac{-3\sqrt[]{11}+4}{14}

c) Recall that \sin(\pi)=0, \cos(\pi)=-1. Then,

\cos(\theta-\pi)=\cos(\theta)\cos(\pi)+\sin(\theta)\sin(\pi) = \frac{-\sqrt[]{33}}{7}\cdot(-1) + 0 = \frac{\sqrt[]{33}}{7}

d) Recall that \tan(\frac{\pi}{4}) = 1 and \tan(\theta) = \frac{\sin(\theta)}{\cos(\theta)}=\frac{-4}{\sqrt[]{33}}. Then

\tan(\theta+\frac{\pi}{4}) = \frac{\tan(\theta)+\tan(\frac{\pi}{4})}{1-\tan(\theta)\tan(\frac{\pi}{4})} = \frac{\frac{-4}{\sqrt[]{33}}+1}{1+\frac{4}{\sqrt[]{33}}}

5 0
3 years ago
Which points are solutions to the linear inequality y < 0.5x + 2? Select three options.
Lisa [10]

Some solutions for the given linear inequality:

y < 0.5x + 2

are:

{(0, 1), (1, 2), (2, 2)}

<h3>Which points are solutions of the linear inequality?</h3>

Here we have the linear inequality:

y < 0.5x + 2

To find the points we can evaluate the right side, and then find values of y such that the inequality is true.

For example, if we use x = 0, then we get:

y < 0.5*0 + 2

y < 2

A value of y such that this is true is y = 1

Then the point (0, 1) is a solution of the inequality.

Another example can be with x = 1:

y < 0.5*1 + 2

y < 2.5

This time we can select y = 2, then the solution is (1, 2).

To get a final solution we can evaluate in x = 2

y < 0.5*2 + 2

y < 3

Then a possible solution is y = 2 again, so the solution is (2, 2).

Notice that for each of these values of x, there are a lot of other points that are solutions.

If you want to learn more about inequalities:

brainly.com/question/18881247

#SPJ1

6 0
2 years ago
How many times does 30 go into 100
shtirl [24]

Answer:  "How many times does 30 go into 100?" is the same as asking "How much is 100 divided by 30?" Thus, the answer can be calculated as follows:

100/30 = 3.33

Step-by-step explanation: HOPE THIS HELP

3 0
3 years ago
Add the polynomials below.<br> (x² + 3x3 – 4x2) +(4x3 + 2x)
AleksAgata [21]
2(x+1) :)))))))))))))))))))
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3 years ago
The mean age of 5 people in a room is 33 years. A person enters the room. The mean age is now 33. What is the age of the person
laila [671]

Answer:

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Step-by-step explanation:

I think you might have made a typo, but it would still be 33 if the mean age stays the same.

6 0
3 years ago
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