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aksik [14]
3 years ago
10

2cos60° +3 sin-45° -3 sin 30° +2 cos 90°​

Mathematics
1 answer:
Oduvanchick [21]3 years ago
4 0

2cos60° + 3sin-45° - 3sin30° + 2cos90°

= 2 × 1/2 + 3 × -1/√3 - 3 × 1/2 + 2 ×0

= 1 - 3/√3 - 3/2 + 0

= 1 - 3/√3 - 3/2

= 1 - 3/1.732 - 1.5. <----> ( √3 = 1.732 )

= 1 - 1.732 - 1.5

= -2.232

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Elanso [62]

Option C:

Perimeter of the \frac{1}{4} of a circle = 10.71 cm

Solution:

Given figure is  \frac{1}{4} of a circle.

It is a quarter of a circle.

Radius = 3 cm, Value of <em>π</em> = 3.14

To find the perimeter of the quarter of a circle.

Perimeter of the quarter of a circle formula: $\frac{\pi r}{2}+2r

$\text {Perimeter} =\frac{\pi r}{2}+2r$

               $=\frac{3.14\times3}{2}+2\times3$

               =4.71+6

               =10.71

Perimeter of the quarter of a circle = 10.71 cm

Option C: 10.7 is the correct answer.

Hence perimeter of the \frac{1}{4} of a circle is 10.71 cm.

6 0
4 years ago
(64 Points) 2y+3=-1(x-2) in standard form
svp [43]

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2 years ago
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Goshia [24]

area = length × breadth

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4 0
2 years ago
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4 0
3 years ago
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murzikaleks [220]

Answer:

1.20

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