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2 years ago

PLEASE HELP ME I BEG YOU

Mathematics

2 answers:

sergiy2304 [10]2 years ago

7 0

Step-by-step explanation:

=(2/5) of 30

=(2/5)×30

=(2×30)/5

=60/5

=12

Rus_ich [418]2 years ago

5 0

You need to find "two-fifths of 30." Of here means multiplication:

$\begin{aligned}\dfrac{2}{5}\cdot 30 &= \dfrac{2}{5}\cdot\dfrac{30}{1}\\[0.5em] &= \dfrac{60}{5}\\[0.5em] &= 12\end{aligned}$

There are 12 athletes in the club.

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Help! How would I solve this trig identity?

NeTakaya

Using simpler trigonometric identities, the given identity was proven below.

<h3>How to solve the trigonometric identity?</h3>

Remember that:

$sec(x) = \frac{1}{cos(x)} \\\\tan(x) = \frac{sin(x)}{cos(x)}$

Then the identity can be rewritten as:

$sec^4(x) - sen^2(x) = tan^4(x) + tan^2(x)\\\\\frac{1}{cos^4(x)} - \frac{1}{cos^2(x)} = \frac{sin^4(x)}{cos^4(x)} + \frac{sin^2(x)}{cos^2(x)} \\\\$

Now we can multiply both sides by cos⁴(x) to get:

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Now we can use the identity:

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Thus, the identity was proven.

If you want to learn more about trigonometric identities:

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1 year ago

Can 72/15 be simplified? Tell me what the number is in YOUR ANSWER. Please and thank you!

Snezhnost [94]

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Step-by-step explanation:

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3 years ago

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spin [16.1K]

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All we need to do is keep multiplying pairs of consecutive numbers until we get above 50.

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2 × 3 = 6 (two)
3 × 4 = 12 (three)
4 × 5 = 20 (four)
5 × 6 = 30 (five)
6 × 7 = 42 (six...)
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2 years ago

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3 years ago

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