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inessss [21]
3 years ago
7

Sin8x=8sinxcosxcos2xcos4x proving trig identity?

Mathematics
1 answer:
weeeeeb [17]3 years ago
7 0
sin 8 x = 2 sin 4x  cos 4x =
= 2 * 2  sin 2x  cos 2x  cos 4 x =
= 4 * 2  sin x  cos x  cos 2x  cos 4x =
= 8  sin x  cos x  cos 2x  cos 4x    ( correct )  
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Answer:slope=1.2


Step-by-step explanation:

Slope=y-y/x-x

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= 6/5

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4 years ago
A triangle has squares on its three sides as shown below. What is the value of x? Three squares having side lengths 3 cm, x cm,
Pani-rosa [81]

Answer:

The value of x is 5 centimeters.

Therefore, option 3 is correct.

Step-by-step explanation:

A triangle has three sides 3,x and 4 cms

Since the triangle is right angle triangle  so, it will follow the Pythagoras theorem:

hypotenuse^2=side^2+side^2    (1)

We have been given three sides x,3 and 4

On substituting the values in (1) we get:

x^2=3^2+4^2

x^2=9+25

\Rightarrow x=5

Hence, the value of x is 5 centimeters.

Therefore, option 3 is correct.

Please look at the attachment for the figure.

3 0
3 years ago
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Find the value of x in the figure. A. 6 C. 3 B. 5 D. 7
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4 0
4 years ago
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A bathtub is the shape of a rectangular prism. The dimensions are 5 1/2 ft times 2 1/2 ft times 2 3/4 ft. What is the volume of
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Answer:

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Step-by-step explanation:

A rectangular prism is also know as a cuboid.

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The volume of a cuboid (rectangular prism) is given as:

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Hence, the volume of the bath tub is:

V = 5½  * 2½ * 2¾

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The volume of the bath tub is 37 \frac{13}{16}  ft^3

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21 x 3.1 / 2 = 32.55

Step-by-step explanation:

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