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kipiarov [429]
3 years ago
5

What quantity should be added to both sides of this equation to complete the square x^2+12x=-15

Mathematics
1 answer:
anzhelika [568]3 years ago
5 0

Answer:

36

Step-by-step explanation:

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Which of the following is not equal to sin⁡(-230°)?
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From trigonometry we know that:

if sin(\theta)=sin(\alpha)

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This can be rewritten in degrees as:

\theta=n(180^{\circ})+(-1)^n\alpha.............(Equation 1)

Now, in our case, \alpha=-230^{\circ}

Therefore, (Equation 1) can be written as:

\theta=n(180^{\circ})+(-1)^n(-230^{\circ})..........(Equation 2)

Now, to find the correct options all that we have to do is replace n by relevant integers and find the values of \theta that match.

For n=2, (Equation 2) gives us: \theta=2\times 180^{\circ}+(-1)^2(-230^{\circ})=360^{\circ}-230^{\circ}=130^{\circ}.

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Now, we know that: -sin(-50^{\circ})=sin(50^{\circ})

Let n=-1, then:

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Only the last option sin(-50^{\circ}) will never match sin(-230^{\circ}) because no integral value of n will ever give \theta=-50^{\circ}

Thus the last option is the correct option.

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Answer:

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Step-by-step explanation:

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Hope you have a good day!



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