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eduard
3 years ago
12

Question 9(Multiple Choice Worth 5 points)

Mathematics
2 answers:
Otrada [13]3 years ago
8 0
2 squared plus 2 squared = the hypotenuse squared.
4+4= the hypotenuse squared.
8= the hypotenuse squared.
the square root of 8 = the hypotenuse.
a squared plus b squared equals c squared.
Pythagorean theorem.
maks197457 [2]3 years ago
6 0

The answer is the square root of 8

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Precalculus PLEASE HELP ME right answers only check all please
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Given :

cos(x)cos(\frac{\pi }{7}) + sin(x)sin(\frac{\pi }{7})=-\frac{\sqrt{2}}{2}

We know the identity

cos(x)cos(y) + sin(x)sin(y)=cos(x-y)

We use this property to simplify the left hand side

So  cos(x)cos(\frac{\pi }{7}) + sin(x)sin(\frac{\pi }{7})=cos(x - \frac{\pi }{7})

cos(x - \frac{\pi }{7}) =-\frac{\sqrt{2}}{2})

we know ,

when cos(x) =-\frac{\sqrt{2}}{2}) then

x = \frac{3\pi }{4} , \frac{5\pi }{4}

For  cos(x - \frac{\pi }{7}) =-\frac{\sqrt{2}}{2})

x - \frac{\pi }{7}= \frac{3\pi }{4} and x - \frac{\pi }{7}= \frac{5\pi }{4}

Add \frac{\pi }{7} on both sides

x= \frac{3\pi }{4} + \frac{\pi }{7} and x= \frac{5\pi }{4} +\frac{\pi }{7}

Finally we add 2npi for general solution

So options C  and D  are correct


6 0
3 years ago
The graph of f(x) = is shown with g(x). Which equation represents the graph of g(x)? g(x) = g(x) = g(x) = + 1 g(x) = –1
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Step-by-step explanation:

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3 years ago
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Step-by-step explanation:

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Answer:

Check explanation

Step-by-step explanation:

I'll give you my way of solving it and you can figure it out from there.

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