3 years ago

Which value, when placed in the box, would result in a system of equations with infinitely many solutions?

Mathematics

1 answer:

cupoosta [38]3 years ago

5 0

Answer:

answer it s 12. just put the value

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If sinA =3/5 and A+B =90 find cosB

-Dominant- [34]

$A+B=90^o\to B=90^o-A\\\\\cos B=\cos(90^o-A)=\cos90^o\cos A+\sin90^o\sin A\\\\=\cos A+1\cdot\dfrac{3}{5}=0+\dfrac{3}{5}=\dfrac{3}{5}\\\\\boxed{\cos B=\dfrac{3}{5}}$

$Used:\\\\\cos(x+y)=\cos x\cos y+\sin x\sin y\\\\\cos90^o=0,\ sin90^o=1$

Other method:

Look at the picture.

$\sin\theta=\dfrac{opposite}{hypotenuse}\\\\\sin A=\dfrac{3}{5}\to opposite=3\ and\ hypotenuse=5$

$\cos\theta=\dfrac{adjacent}{hypotenuse}\\\\adjacent=3\ and\ hypotenuse=5\to\cos B=\dfrac{3}{5}$

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morpeh [17]

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Step-by-step explanation:

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sammy [17]

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Gre4nikov [31]

To go from km/h to M/S you have to multiply by 3,6 so this must be the answer:
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3 years ago

Emma ran 4 1/2 miles. For 3/4 of her run,she ran uphill. How many miles did she run uphill?

Gemiola [76]

Answer:

its c hope it helps not totally sure but yeah

Step-by-step explanation:

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2 years ago

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