4 years ago

If ----- 1 =2 3=18 5=50 4=32 Then, 6=?

Mathematics

2 answers:

Leokris [45]4 years ago

8 0

Answer:

i believe the answer is 80

Step-by-step explanation:

GalinKa [24]4 years ago

3 0

66, bcz 6 times 11 is 66

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Which expression is equivalent to 2cos^2(x/2)- cos(x)?<br> Edge 2020

olchik [2.2K]

Given:

The expression is

$2\cos^2(\dfrac{x}{2})-\cos (x)$

To find:

The expression which is equivalent to the given expression.

Solution:

We have,

$2\cos^2(\dfrac{x}{2})-\cos (x)$

We know that,

$\cos x=2\cos^2 (\dfrac{x}{2})-1$

Using this formula, the given expression can be written as

$2\cos^2(\dfrac{x}{2})-\left(2\cos^2(\dfrac{x}{2})-1\right)$

$=2\cos^2(\dfrac{x}{2})-2\cos^2(\dfrac{x}{2})+1$

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Therefore, the given expression is equivalent to 1.

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3 years ago

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Answer:

Step-by-step explanation:

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7 0

4 years ago

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jeyben [28]

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3 years ago

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kotykmax [81]

Answer:

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3 years ago

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Answer:

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