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Luden [163]
3 years ago
15

If the sin 30° is 1 over 2, then the cos ____° = _____.

Mathematics
2 answers:
Ahat [919]3 years ago
8 0

Answer:

Below.

Step-by-step explanation:

(sine) sin=30=1/2

=cos [90-30]

Which means cos=60

Same as:

(cosine) cos=60=1/2 or Sin30=Cos 60=1/2

Hence, the answer is...

cos 60° = ½....

By:✨ RobloxYt ✨

kotykmax [81]3 years ago
6 0

Step-by-step explanation:

The sine of an angle is the same as the cosine of its complement.

If sin 30° = ½, then cos 60° = ½.

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If f(x)=3x^2-5 and g(x)=-2x+5, then f(3)g(3)=
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=

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(

x

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+

g

(

x

)

:

(

f

+

g

)

(

x

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3

x

2

−

x

+

5

+

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(

f

+

g

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(

x

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=

3

x

2

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−

x

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2

x

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+

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5

−

3

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(

f

+

g

)

(

x

)

=

3

x

2

+

x

+

2

(

f

+

g

)

(

x

)

=

3

x

2

+

x

+

2

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(

f

+

g

)

(

x

)

=

f

(

x

)

+

g

(

x

)

:

(

f

+

g

)

(

x

)

=

3

x

2

−

x

+

5

+

2

x

−

3

Add like terms:

(

f

+

g

)

(

x

)

=

3

x

2

+

(

−

x

+

2

x

)

+

(

5

−

3

)

(

f

+

g

)

(

x

)

=

3

x

2

+

x

+

2

(

f

+

g

)

(

x

)

=

3

x

2

+

x

+

2

Explanation:

(

f

+

g

)

(

x

)

=

f

(

x

)

+

g

(

x

)

:

(

f

+

g

)

(

x

)

=

3

x

2

−

x

+

5

+

2

x

−

3

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(

f

+

g

)

(

x

)

=

3

x

2

+

(

−

x

+

2

x

)

+

(

5

−

3

)

(

f

+

g

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x

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9. The endpoints of a diameter of a circle are A (2,1) and B(5,5). Find the area of the circle in terms of . (1 point)
Georgia [21]

Answer:

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Step-by-step explanation:

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Area of the circle is Ac=π⋅r2=π⋅2.52=6.25π sq.unit[Ans]

5 0
3 years ago
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