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mamaluj [8]
3 years ago
13

If cos2x-sinx=0 , then which of the following values could be sinx?

Mathematics
2 answers:
agasfer [191]3 years ago
8 0

Answer:

A) -1

Step-by-step explanation:

cos2x - sinx = 1 - 2 sin²x - sinx = 0

2 sin²x + sinx -1 = 0

(sinx + 1) (2sinx - 1) = 0

sinx = -1 or sinx = 1/2

Travka [436]3 years ago
6 0

Answer:

C. 0

Step-by-step explanation:

hope it helped somehow

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Answer:

i) pi×4500 cm³

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Step-by-step explanation:

in general : the diameter is 30 cm, the radius is half of that (15 cm)

i)

the volume of a cylinder is base area times height.

Vc = pi×r²×h = pi×15²×20 = pi×225×20 = pi×4500 cm³

ii)

similar to volume, the side "mantle" area of the cylinder is the circumference of the base area times height.

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Scm = 2×pi×r×h = 2×pi×15×20 = pi×30×20 = pi×600 cm²

iii)

for this we need now to do the multiplication with pi and then convert the cm³ to liters.

1 liter = a cube of 10 cm side length = 10×10×10 = 1000 cm³

pi×4500 = 14137.17 cm³ = 14.13717 liters or rounded 14 liters

3 0
3 years ago
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jolli1 [7]
The sum of four and a number
7 0
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SIZIF [17.4K]

The total price she paid for the shirt was $27.03

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3 years ago
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8 0
2 years ago
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melisa1 [442]
So basically sam split the 1000 to 2 groups so we have 1000 ÷ 2
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