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3 years ago

Please answer the question in the powerpoint below. Its so simple but im not smart so please <3 <3 <3

Mathematics

1 answer:

vekshin13 years ago

4 0

Answer:

38$ total

Step-by-step explanation:

they would have to go about 2-3 times

Please mark brainliest

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PLS HELP, i am literally crying over this, Guaranteed brainliest if you get it right

Agata [3.3K]

I’m pretty sure the answer is -10

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3 years ago

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If the sine ratio is given, then how can sin 0/2 be determined?

pogonyaev

Step-by-step explanation:

If you know, the sine. You must find the cos ratio, using the Pythagorean trig theorem.

Next, you use the half angle identity for sin

$\sin( \frac{ \alpha }{2} ) = \sqrt{ \frac{1 - \cos(a) }{2} }$

Example.

$\sin( \alpha ) = \frac{ \sqrt{3} }{2}$

We must find

$\sin( \frac{ \alpha }{2} )$

First, use the Pythagorean identity

$\sin {}^{2} ( \alpha ) + \cos {}^{2} ( \alpha ) = 1$

$( \frac{ \sqrt{3} }{2} ) {}^{2} + \cos {}^{2} (a) = 1$

$\frac{3}{4} + \cos {}^{2} (a) = 1$

$\cos {}^{2} (a) = \frac{1}{4}$

$\cos( \alpha ) = \frac{1}{2}$

Now use the half angle identiy

$\sin( \frac{ \alpha }{2} ) = \sqrt{ \frac{1 - \cos( \alpha ) }{2} }$

$= \frac{ \sqrt{1 - \frac{1}{2} } }{ \sqrt{2} }$

$= \frac{ \sqrt{ \frac{1}{2} } }{ \sqrt{2} }$

$= \frac{ \sqrt{ \frac{1}{2} } }{ \sqrt{2} } \times \frac{ \sqrt{2} }{ \sqrt{2} } = \frac{ \sqrt{1} }{ \sqrt{4} } = \frac{1}{2}$

So the answer for our example is 1/2

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2 years ago

Which pairs of angles are alternate exterior angles? Choose all answers that are correct.

Maksim231197 [3]

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3 years ago

I will mark you brainlyest if you answer this

babunello [35]

Answer:

I dont get the question

Step-by-step explanation:

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