I need the help please

Mathematics

2 answers:

Kruka [31]3 years ago

5 0

The answer is 45

2x+45+x=180
3x+45=180
3x=135
X=45

STALIN [3.7K]3 years ago

4 0

Step-by-step explanation:

We know that adding these angles together will result in the whole line, which means together they are supplementary. We know that a straight line is equal to 180, so we will simply add these two together and set them equal to 180.

$2x+45+x=180$

Add like terms.

$3x+45=180$

Subtract 45 from both sides.

$3x=135$

Divide.

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beks73 [17]

The result of expanding the trigonometry expression $\sin^2(\theta) * (1 + \cos(\theta))$ is $cos^0(\theta) + \cos(\theta) - \cos^2(\theta) - \cos^3(\theta)$

<h3>How to evaluate the expression?</h3>

The expression is given as:

$\sin^2(\theta) * (1 + \cos(\theta))$

Express $\sin^2(\theta)$ as $1 - \cos^2(\theta)$ .

So, we have:

$\sin^2(\theta) * (1 + \cos(\theta)) = (1- \cos^2(\theta)) * (1 + \cos(\theta))$

Open the bracket

$\sin^2(\theta) * (1 + \cos(\theta)) = 1 + \cos(\theta) - \cos^2(\theta) - \cos^3(\theta)$

Express 1 as cos°(Ф)

$\sin^2(\theta) * (1 + \cos(\theta)) = cos^0(\theta) + \cos(\theta) - \cos^2(\theta) - \cos^3(\theta)$

Hence, the result of expanding the trigonometry expression $\sin^2(\theta) * (1 + \cos(\theta))$ is $cos^0(\theta) + \cos(\theta) - \cos^2(\theta) - \cos^3(\theta)$

Read more about trigonometry expressions at:

brainly.com/question/8120556

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3 0

3 years ago

Please help, will mark brainliest if correct!!!

Hatshy [7]

Answer:8.5

Step-by-step explanation:

Pythagorean Theorem

a^2 + b^2 = c^2

3^2 + 8^2 = c^2