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4 years ago

Cos^2 75degrees-sin^2 75 degrees

Mathematics

1 answer:

Kitty [74]4 years ago

5 0

$cos(150\°)$
$cos(2(75\°))$
$cos^{2}(75\°) - sin^{2}(75\°)$
$1 - 2sin^{2}(75\°)$
<span> $2cos^{2}(75\°) - 1$ </span>

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A/b=c for b<br> please explain this is sorta confusing :'(

PtichkaEL [24]

If you want to solve $\dfrac{a}{b} = c$ for $b$ , start by getting rid of the fraction.

Multiply both sides of the equation by $b$ .

$b\cdot \dfrac{a}{b} = b\cdot c$

This will get rid of the fraction on the left and give you

$a = b\cdot c$

Now this is a regular old equation without fractions. To get $b$ by itself, you need to divide away $c$ from both sides of the equation.

Can you finish it from there?

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3 years ago

A student loan needs to be paid off beginning the first year after graduation. Beginning at Year 1, there is $52,000 remaining t

Rom4ik [11]

Answer:

The equation is: $f(x) = 52000 - 8000x$

Step-by-step explanation:

Given

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Rate = 8000 each year

Required

Determine the equation of the graph

The equation can be determined using.

$Amount = Initial - Rate* Years$

We used minus (-) because, the amount reduces as the student pays.

Let

$y = Amount$

$x = Years$

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$y = Initial - Rate * x$

Substitute values for Initial and Rate

$y = 52000 - 8000 * x$

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Express as a function:

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3 years ago

Three times a number is 201 what is the number?

lana [24]

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elena-14-01-66 [18.8K]

Answer:

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Step-by-step explanation:

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How do you factor 7+14

mote1985 [20]

You could factor a 7 out of 7 + 14 to get 7(1 + 2).

This would equal the same thing as 7 + 14, which is 21.

7 * 3 = 21.

21 can be factored like so:

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4 years ago