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3 years ago

Prove the following identi v 1-cos2A/sin2A=tanA

Mathematics

1 answer:

SVETLANKA909090 [29]3 years ago

8 0

Answer:

1-cos2A/sin2A

=(1-cos^2 A+sin^2 A)/(2sinAcosA)

=(sin^2 A+sin^2A)/2sinAcosA

=2sin^2 A/2sinAcos^2 A

=sinA/cosA

=tanA

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Find the value of x, such that the expression 1/4x + 4/3x - 5/6x + 1 equals 0

ANTONII [103]

Answer:

The value of x is $- \frac{4}{3}$

Step-by-step explanation:

☆Combine like terms and solve!

$\frac{1}{4} x + \frac{4}{3} x - \frac{5}{6} x + 1 = 0 \\ \\ \frac{3}{4} x + 1 = 0 \\ \frac{ \: \: \: \: \: \: \: \: \: \: \: \: - 1 = - 1}{ \frac{ \frac{3}{4}x }{ \frac{3}{4} } = \frac{ - 1}{ \frac{3}{4} } } \\ \\ x = - \frac{4}{3}$

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3 years ago

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Answer:

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Step-by-step explanation:

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Dmitriy789 [7]

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3 years ago

Four big water bottles can hold 8 gallons of water. How much water can ten big water bottles hold.

g100num [7]

Step-by-step explanation:

Part 1

To find out the amount of water ten big water bottles can hold, we have to find out how much water is in each water bottle. To do this, we divide the amount we are looking for by the number of items.

8 ÷ 4 = 2

Part 1 answer: Each water bottle can hold 2 gallons of water.

Part 2

Now that we know the amount of water in each water bottle, we can find out how much water 10 water bottles can hold. To do so, we multiply our previous answer, 2, by the number of items (10).

2 • 10 = 20

Part 2 answer: 10 water bottles can hold 20 gallons of water.

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I hope this helps you!

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3 years ago

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