Express 49 as the sum of odd numbers

Mathematics

1 answer:

ss7ja [257]3 years ago

3 0

One way would be 49 = 21 + 7 + 7 +7 + 7

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Solve the equation in the interval 0 to 2pi.

galben [10]

Answer:

You don't need to single out $\cos \theta$ to solve this question.

To solve:

$\begin{aligned}3 \cos 4 \theta & = -2\\\\\cos 4 \theta & = -\dfrac{2}{3}\\\\4 \theta & = \cos^{-1}\left( -\dfrac{2}{3\right)}\\\\\implies 4 \theta & =2.30053... \pm 2 \pi n, -2.30053...\pm 2 \pi n\\\\\theta & =\dfrac{2.30053...}{4} \pm \dfrac{\pi n}{2}, -\dfrac{2.30053...}{4}\pm \dfrac{\pi n}{2}\end{aligned}$

So for the given interval $0\leq \theta \leq 2 \pi$

$\implies \theta =0.575, 2.146, 3.717, 5.288, 0.996, 2.566, 4.137, 5.708\:\:(\sf 3 \: d.p.)$

(As confirmed by the attached graph)

5 0

2 years ago

Read 2 more answers

<img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B%20%5Cfrac%7B36%7D%7B4%7D%20%7D%20" id="TexFormula1" title=" \sqrt{ \frac{36}{4}

iris [78.8K]

Step-by-step explanation:

$\sqrt{36/4} =$ $\sqrt{36} /\sqrt{4}$

$\sqrt{36}=6$

$\sqrt{4} =2$

6/2=3

Hope that helps :)

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3 years ago

The cone below has a radius of 3 inches, a height of 4 inches, and a slant height of 5 inches. What is the approximate lateral a

Natali [406]

Cone Lateral Area = (π • r • slant height)
Cone Lateral Area = (PI * 3 * 5)
Cone Lateral Area = 47.1 square inches
Cone Lateral Area = 47 square inches (rounded to nearest whole number).

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10 ft

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6,800 cb is the answer

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3 years ago

Can you pls help me with this

photoshop1234 [79]

Answer:

Ok sooooo I think that ist is B