2 years ago

Give each a sum or difference: a. -12+4= b. -4+1= c. 4 - 12= d. 4+12=

Mathematics

1 answer:

wlad13 [49]2 years ago

6 0

A. -8
B. -3
C. -8
D. 16

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Find tan(450-a), If <br><img src="https://tex.z-dn.net/?f=%20%5Ctan%28a%29%20%3D%20%20%5Cfrac%7B1%7D%7B2%7D%20" id="TexFormula1"

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$tan(450-a)=5\sqrt{3}-8$

Step-by-step explanation:

We know that:

$tan(a-b)=\frac{tan(a)-tan(b)}{1+tan(a)tan(b)}$

$tan(450-a)=\frac{tan(450)-tan(a)}{1+tan(450)tan(a)}$

Remember:

450°=360°+60°

and:

$tan(a)=\frac{1}{2}$

Thus:

$tan(450-a)=\frac{tan(60)-tan(a)}{1+tan(60)tan(a)}\\\\$

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2 years ago

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Step-by-step explanation:

Since this circle is partial we will divide the area of the whole circle by 2

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