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3 years ago

Can anyone pls help me in this pls

Mathematics

2 answers:

alukav5142 [94]3 years ago

7 0

Answer:

x² = 17² - 8²

Step-by-step explanation:

Pythagoras theorem

Diagonal ² = length² + width²

Rearrange to get length in its own

Length ² = diagonal ² - width²

Replace length with x, diagonal with 17 and width with 8

x² = 17² - 8²

kenny6666 [7]3 years ago

4 0

Answer:

x^2= 17^2-8^2

Step-by-step explanation:

just do reverse PEMDAS on the Pythagorean Theorem

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Cos(−θ)=√3/3, sinθ<0

Delicious77 [7]

Answer:

$\sin\theta=-\frac{\sqrt{6}}{3}$

Step-by-step explanation:

The given trigonometric equation is $\cos(-\theta)=\frac{\sqrt{3} }{3}$ .

We can either use the Pythagorean identity or the right angle triangle to solve for $\sin\theta$ .

According to the Pythagorean identity,

$\cos^2\theta+\sin^2\theta=1$

Recall that, the cosine function is an even function, therefore

$\cos(-\theta)=\cos(\theta)$

$\Rightarrow \cos(\theta)=\frac{\sqrt{3} }{3}$ .

We substitute this value in to the above Pythagorean identity to get;

$(\frac{\sqrt{3}}{3})^2+\sin^2\theta=1$

$\Rightarrow \frac{3}{9}+\sin^2\theta=1$

$\Rightarrow \sin^2\theta=1-\frac{3}{9}$

$\Rightarrow \sin^2\theta=\frac{6}{9}$

$\Rightarrow \sin\theta=\pm \sqrt{\frac{6}{9}}$

$\Rightarrow \sin\theta=\pm \frac{\sqrt{6}}{3}$

But we were given that,

$\sin\theta\:$ , so we choose the negative value.

$\Rightarrow \sin\theta=-\frac{\sqrt{6}}{3}$

The correct answer is B

7 0

3 years ago

Help me for number 14 I NEED SHOW WORK TOI PLZ!

S_A_V [24]

Ouch! That is hard but I can do it. First, find the area of the triangle. (for both is 60) Then find the area of the rectangle (base) which is 48. Then do the rectangles on the sides which are 72 each (for both is 144) Then add it all together and get 252 ft squared or cubed.

6 0

3 years ago

The diameter of a circle is equivalent to the

jasenka [17]

Answer:

Step-by-step explanation:

The diameter of a circle is twice the radius, so the statement is false.

6 0

2 years ago

Read 2 more answers

Plzzz help me please I need the answers like right now so I’m counting on u guys to help me please who ever is correct get the B

postnew [5]