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Delvig [45]
3 years ago
7

HELP ME PLEASE HELP PLEASE HELP

Mathematics
1 answer:
Marina86 [1]3 years ago
5 0

Answer:

c=\sqrt{12} or c=3.46410161514

Step-by-step explanation:

Use Pythagoras theorem: a²=b²+c², where a is the side opposite the right angle, and b and c are the other sides:

a²=b²+c²

4²=2²+c²

16=4+c²

c²=12

c=\sqrt{12} or c=3.46410161514

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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}

8 0
3 years ago
-pls answer all thanks!!! HAVE A BLESS DAY
blagie [28]
1. = 3
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2 years ago
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4 years ago
It’s asking to write an equation of the line with a slope...please help!!
Vlada [557]

Answer:

y = -3/4x - 6

Step-by-step explanation:

Use y-intercept (0, -6) and slope -3/4 and put into y=mx+b form to solve for b

Remember that m is also known as slope!

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3 years ago
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irakobra [83]

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!         The result can be shown in multiple forms.

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