3 years ago

- 60 points and brainliest if you can help me answer this:) -

Mathematics

1 answer:

Anna35 [415]3 years ago

4 0

Answer:

Set it up as a proportion miles over miles and hours over hours multiply 938*4 and divide that by 268 and you will get 14

Step-by-step explanation:

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Find the value of sin(a/2) if cosa= 12/13<br>

daser333 [38]

Answer: sin $\frac{a}{2}$ = ± $\frac{1}{\sqrt{26} }$

Step-by-step explanation:

We very well know that,

cos2A=1−2sin²A

⟹ sinA = ± $\sqrt{(1-} \frac{cos2A}{2} )$

As required, set A = $\frac{a}{2}$ & cos a= $\frac{12}{13}$ ,thus we get

sin $\frac{a}{2}$ =± $\sqrt{\frac{1-cos a}{2} }$

∴ sin $\frac{a}{2}$ =± $\sqrt{\frac{1-\frac{12}{13} }{2} }$ = ± $\frac{1}{\sqrt{26} }$

since ,360° < $\frac{a}{2}$ <450°

,180° < $\frac{a}{2}$ <225°

Now, we are to select the value with the correct sign. It's is obvious from the above constraints that the angle a/2 lies in the III-quadrant where 'sine' has negative value, thus the required value is negative.

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3 years ago

A flashlight and battery sell together for $9. If the flashlight costs $5 more than the battery, what is the price of each item?

MatroZZZ [7]

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Find the radius or diameter of each circle with the given dimensions.<br><br> d=30 m

Alex_Xolod [135]

Answer:

r=94.2

Step-by-step explanation:

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C equals about 94.2

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The answer for the question is 4

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The nutritional information on Xuan’s container of crackers said that it had 162 calories. If there were 24 crackers in the cont

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B. approximately 7 calories

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