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olya-2409 [2.1K]
2 years ago
12

Can someone solve this

Mathematics
1 answer:
valentinak56 [21]2 years ago
3 0

triangle TUV is congruent to triangle TBA

by SAS congruency

hope it helps...!!!!

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Tan(x+pi) + 2sin(x+pi)=0<br><br>can you help prove this and make the left side equal the right?
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This is not an identity but an equation. You're supposed to find the values of x for which this is true. It is *not* true for all values of x.

To see why:

\tan x has period \pi, which means \tan(x+\pi)=\tan x.

The angle sum identity for \sin x says that

\sin(x+\pi)=\sin x\cos \pi+\cos x\sin\pi=-\sin x

So

\tan(x+\pi)+2\sin(x+\pi)=\tan x-2\sin x

By definition of \tan x,

\tan x=\dfrac{\sin x}{\cos x}

and so

\tan x-2\sin x=\sin x\left(\dfrac1{\cos x}-2\right)

which is only 0 if either \sin x=0 (which only happens for certain values of x) or \dfrac1{\cos x}-2=0\implies\cos x=\dfrac12 (which also only happens for certain values of x). It's these values of x you want to find.

\sin x=0 whenever x is a multiple of \pi, i.e. x=n\pi for any integer n.

If 0\le x, then \cos x=\dfrac12 is true for x=\dfrac\pi3 and x=\dfrac{5\pi}3. Then to account for all other possible values, we add a multiple of 2\pi, so that x=\dfrac\pi3+2n\pi or x=\dfrac{5\pi}3+2n\pi for integers n.

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3 years ago
Write 1.25% as a decimal
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It will be 0.08. This is 1/100 of 8 as 100 cm is 1m
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irinina [24]

Answer:

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Step-by-step explanation:

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2) To find the probability of selecting a blue marble, divide the number of blue marbles by the number of total marbles:

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I hope this helps!

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