3 years ago

What is the equation of the line that is perpendicular to

Mathematics

1 answer:

s344n2d4d5 [400]3 years ago

5 0

Answer:

y= x-6

Step-by-step explanation:

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Cot^2 135-sin210+5cos^2 225

TiliK225 [7]

$\cot135^o=\cot(90^o+45^o)=-\tg45^o=-1\\\\\sin210^o=\sin(180^o+30^o)=-\sin30^o=-\dfrac{1}{2}\\\\\cos225^o=\cos(180^o+45^o)=-\cos45^o=-\dfrac{\sqrt2}{2}$

$\cot^2135^o-\sin210^o+5\cos^2225^o=(-1)^2-\left(-\dfrac{1}{2}\right)+5\cdot\left(-\dfrac{\sqrt2}{2}\right)^2\\\\=1+\dfrac{1}{2}+5\cdot\dfrac{1}{2}=1\dfrac{1}{2}+2\dfrac{1}{2}=4$

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4 years ago

What is the area of a circle with radius of 3 inches? Use pie =3.14 A .18.84 square roots B .28.26 square roots C .9.42 square r

tatiyna

Answer:

B. 28.26

Step-by-step explanation:

First you have to find the circumference:

R²= 3²=9

Then you multiply your circumference by 3.14 to get you answer:

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4 years ago

The Movie Haven is planning to order new medium-size popcorn containers. It has a choice of four different containers. It costs

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Answer:

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Step-by-step explanation:

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3 years ago

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Answer:

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