3 years ago

PLEASE HELP!

Mathematics

2 answers:

Murljashka [212]3 years ago

6 0

Answer: i think its b

Step-by-step explanation:

Reil [10]3 years ago

5 0

Answer is B

Step-by-step explanation:

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Four families each bought the same number of chairs to s block party. Three more chairs are needed to seat all 27 people. How ma

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0°

360°

Step-by-step explanation:

We want to solve the equation,

$\cos(x + 45) + \cos(x - 45) = \sqrt{2}$

We expand using trigonometric identities to get;

$\cos(x) \cos( 45) - \sin(x) \sin(45) + \cos(x) \cos( 45) + \sin(x) \sin(45) = \sqrt{2}$

$\frac{ \sqrt{2} }{2} \cos(x) - \frac{ \sqrt{2} }{2} \sin(x) + \frac{ \sqrt{2} }{2} \cos(x) + \frac{ \sqrt{2} }{2} \sin(x) = \sqrt{2}$

Simplify;

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Add

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Divide by 2

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Take cosine inverse;

In the

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