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2 years ago

Find the function value of cos^2 (7pi/8)

1 answer:

7 0

$\cos^2\dfrac{7\pi}8=\dfrac12\left(1+\cos\dfrac{7\pi}4\right)$
$=\dfrac12+\dfrac12\cos\left(-\dfrac\pi4\right)$
$=\dfrac12+\dfrac12\cos\dfrac\pi4$
$=\dfrac12+\dfrac1{2\sqrt2}$
$=\dfrac{\sqrt2+1}{2\sqrt2}$
$=\dfrac{2+\sqrt2}4$

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3 years ago

What is the function graphed below?

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Answer:

B. y = x + 0.5

Step-by-step explanation:

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3 years ago

1. A beaker holding 1.5 litres of water is placed in a temperature-controlled room so that 120 mL of

Nikitich [7]

Answer:

Oi tudo bem? 

meu nome é Ana Kesia, e qual é o seu nome também? 

Desculpe-me eu Nn consegui responder sua pergunta. 

Mas mesmo assim, agradeço pelos pontos estava precisando. 

tchau, tenha uma Ótima tarde! 

Bons estudos nas suas atividades! ❤♥

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3 years ago

The sum of three numbers is 83. The second number is 5 less than the first. The third number is 2 times the first. what are the

coldgirl [10]

Answer:

22, 17, and 44.

Step-by-step explanation:

So what you do is you will have three equations that we will put together.

1. x. The first number is x because they don't give us anything about it.

2. x-5. It says that the second number is 5 less than the first number.

3. 2x. It says that the third number is 2 times the first number.

x+x-5+2x=83.

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That is the first number. To find the second and third, you will plug 22 into the x.

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3 years ago

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Alika [10]

Answer:

Step-by-step explanation:

7m = 105

m = 105/7 = 15

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3 years ago