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-BARSIC- [3]
4 years ago
13

Can someone explain to my why sin(90)=1

Mathematics
1 answer:
ivann1987 [24]4 years ago
3 0
On the unit circle: the end of the terminal side of a 90 degree angle is (1,0) where 1 is the value of sin(90°) and 0 is the value of cos(90°)

On the graph of sine: 90° = \frac{ \pi }{2} radians. if f(x) = sin(x) in radians, f(\frac{ \pi }{2}) = 1/2
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The sum of the measures of the angles is 180. The sum of the measures of the second and third angles is two times the measure of
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<h2>60,47,73</h2>

Step-by-step explanation:

Let the first angle be a degrees

Let the second angle be b degrees

Let the third angle be c degrees

It is given that sum of angles is 180 degrees.

so,a+b+c=180                      ...(i)

It is given that sum of the measures of the second and third angles is two times the measure of the first angle.

b+c=2\times a                     ...(ii)

It is given that the third angle is 26 more than the second.

c=26+b                                ...(iii)

using (ii) and (iii),

b+b+26=2a

b+13=a

using (i),(ii) and (iii),

a+b+c=a+a-13+26+b=a+a-13+26+a-13=3a

3a=180

a=60

b=a-13=60-13=47

c=26+b=26+47=73

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4 years ago
What is the radius of the cone?<br><br> 1cm<br> 2cm<br> 4cm<br> 8cm
svetlana [45]

Answer:

4

Step-by-step explanation:

r = \sqrt{3} \frac{v}{\pi h}

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\sqrt{3} \frac{157.9136}{\pi 12} = 3.54

3.54 rounded up is 4

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alexgriva [62]
50,000,000 or 50 million
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Answer:

A

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The answer is 11.7473
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