3 years ago

Simplify the following, where k represents any integer: cos(2kpi-x)(-sin(2kpi-x))

Mathematics

1 answer:

Citrus2011 [14]3 years ago

5 0

= cos( -x ) * [ - sin( - x ) ] = cosx * sinx ;
cosx * sin x is the right answer !

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How many times smaller is 2 × 10^-10 than 4 × 10^-5

natta225 [31]

Answer:

200,000

Step-by-step explanation:

To find how many times smaller is smaller number than greater number, divide greater number by smaller number.

Greater number $=4\times 10^{-5}$

Smaller number $=2\times 10^{-10}$

Then

$\dfrac{\text{Greater number}}{\text{Smaller number}}\\ \\=\dfrac{4\times 10^{-5}}{2\times 10^{-10}}\\ \\=\dfrac{4}{2}\times \dfrac{10^{-5}}{10^{-10}}\\ \\=2\times \dfrac{1}{10^{-5}}\\ \\=2\times 10^5\\ \\=2\times 100,000\\ \\=200,000$

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4 years ago

If y varies directly with x, and y = 18 when x = 4, what is the constant of proportionality?

GREYUIT [131]

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3 years ago

Which of the following uses the distributive property correctly?

Mila [183]

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3 years ago

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Step-by-step explanation: