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BlackZzzverrR [31]
3 years ago
9

Which formula is used to find the volume of a pyramid? A) Area of its base · height. B) 1 2 (Area of its base · height) C) 1 3 (

Area of its base · height) D) 3·(Area of its base · height)
Mathematics
2 answers:
OLEGan [10]3 years ago
4 0
Length•width•height
serg [7]3 years ago
3 0

Answer:

the formula for finding the volume of a pyramin is (lenght*width*height)/3

or (area of base*height) divided by 3

Step-by-step explanation:

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Find sin(2x), cos(2x) and tan (2x) from the given information. cot(x)=2/3, x in quadrant I
Usimov [2.4K]

Answer:

1.) 6√13/13

2.) 4√13/13

3.) 3

Step-by-step explanation:

given that cot(x) = 2/3

But cot(x) = 1/tan(x)

Substitutes 1/tan(x) for cot(x)

1/tan(x) = 2/3

Reciprocate both sides

Tan(x) = 3/2 = opposite/adjacent

Use pythagorean theorem to find the hypothenus.

Hypothenus = sqrt ( 3^2 + 2^2 )

Hypothenus = sqrt ( 9 + 4 )

Hypothenus = sqrt (13)

Hypothenus = √13

1.) Sin(x) = opposite/hypothenus = 3/√13

Rationalise

3/√13 × √13/√13

3√13/13

Sin(2x) = 2 × 3√13/13

Sin(2x) = 6√13/13

2.) Cos( x ) = adjacent/hypothenus

Cos (x) = 2/√13

Rationalise

2/√13 × √13 /√13

2√13/13

Cos(2x) = 2 × 2√13/13

Cos(2x) = 4√13/13

3.) Tan (x) = 3/2

tan (2x) = 2 × 3/2

Tan(2x) = 3

4 0
3 years ago
Pls help i don't know Anymore​
ch4aika [34]

1/3

本题已由中国数学会官方解答(现有会员:2人)

8 0
2 years ago
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