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serg [7]
3 years ago
7

Can someone please help me out

Mathematics
2 answers:
sergey [27]3 years ago
8 0

Answer:

16

Step-by-step explanation:

I just used my calculator

quester [9]3 years ago
3 0

Answer:

16

Step-by-step explanation:

its just 16

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Please Help!!!
algol [13]
f\left(\dfrac\beta2\right)=\sin\dfrac\beta2

Recall the half-angle identity:

\sin^2\dfrac\beta2=\dfrac{1-\cos\beta}2\implies\sin\dfrac\beta2=\pm\sqrt{\dfrac{1-\cos\beta}2}

So in order to find f\left(\dfrac\beta2\right), we only need to know the value of \cos\beta. But there are two possible values. To decide which to take, we use the given information: we know that \beta lies in quadrant III, which means \pi, so \dfrac\pi2, which places \dfrac\beta2 in quadrant II. In this quadrant, the sine of angle is positive, and so

\sin\dfrac\beta2=\sqrt{\dfrac{1-\cos\beta}2}

\beta is an angle of a ray whose terminal point, \left(-\dfrac13,y\right) lies on the circle x^2+y^2=1. The x-coordinate is all we need to know in order to find that \cos\beta=-\dfrac13. So,

\sin\dfrac\beta2=\sqrt{\dfrac{1-\left(-\frac13\right)}2}=\sqrt{\dfrac46}=\dfrac{\sqrt2}{\sqrt3}=\dfrac{\sqrt6}3
6 0
3 years ago
Once a commercial plane reaches the desired altitude, the pilot often travels at a cruising speed. On average, the cruising spee
LiRa [457]
We know that the commercial plane travels 570 miles/hour. To find out how many miles does the plane travel, we do:
570 × 7 = 3990 miles.
Therefore, the plane travel 3990 miles.
5 0
4 years ago
Find the distance between the points (2,1), (-3,6)
topjm [15]

Answer:

5 times the square root of 2 or 7.071

Step-by-step explanation:

Hope it helps!

5 0
3 years ago
Multiply the factors which appear in both lists that you made in This gives you the HCF of 60 and 80
7nadin3 [17]

Answer:

HCF of 60 and 80 is 20.

Step-by-step explanation:

5 0
3 years ago
Can someone help me please?
Roman55 [17]

Answer:

X-16 the first one

Step-by-step explanation:

The first one is equal to x-4

3 0
4 years ago
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