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3 years ago

Can someone help me please I don’t understand this problem

Mathematics

1 answer:

laiz [17]3 years ago

6 0

The answer is C. 45. Here's the work to prove it: c = correct answer, i = incorrect answer;

-2(c + i = 50)

2c - 3i = 75

-2c - 2i = -100

-5i/-5 = -25/-5

i = 5

c + 5 - 5 = 50 - 5

c = 45

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Mashcka [7]

Answer:

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Step-by-step explanation:

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3 years ago

The value of 4 + 44/10 + 404/100 +

nydimaria [60]

Answer:

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tresset_1 [31]

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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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3 years ago

If x= sin theta then x/√1-x^2 is

SCORPION-xisa [38]

Well,

Given that $x=\sin(\theta)$ ,

We can rewrite the equation like,

$\dfrac{\sin(\theta)}{\sqrt{1-\sin(\theta)^2}}$

Now use, $\cos(\theta)^2+\sin(\theta)^2=1$ which implies that $1-\sin(\theta)^2=\cos(\theta)^2$

That means that,

$\dfrac{\sin(\theta)}{\sqrt{1-\sin(\theta)^2}}\Longleftrightarrow\dfrac{\sin(\theta)}{\sqrt{\cos(\theta)^2}}$

By def $\sqrt{x^2}=x$ therefore $\sqrt{\cos(\theta)^2}=\cos(\theta)$

So the fraction now looks like,

$\dfrac{\sin(\theta)}{\cos(\theta)}$

Which is equal to the identity,

$\boxed{\tan(\theta)}=\dfrac{\sin(\theta)}{\cos(\theta)}$

Hope this helps.

r3t40

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3 years ago