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vovangra [49]
3 years ago
7

5 (8 4) = (5 × 8) + (5 × 4)

Mathematics
2 answers:
RoseWind [281]3 years ago
7 0

Answer:...

Step-by-step explanation:

vovangra [49]3 years ago
4 0

Answer: it think its 60

Step-by-step explanation:

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What is the value of cosθ given that (−2, −3) is a point on the terminal side of θ ?
snow_tiger [21]

Answer:

-0.555

Step-by-step explanation:

The terminal point of the vector in this problem is

(-2,-3)

So, it is in the 3rd quadrant.

We want to find the angle \theta that gives the direction of this vector.

We can write the components of the vector along the x- and y- direction as:

v_x = -2\\v_y = -3

The tangent of the angle will be equal to the ratio between the y-component and the x-component, so:

tan \theta = \frac{v_y}{v_x}=\frac{-3}{-2}=1.5\\\theta=tan^{-1}(1.5)=56.3^{\circ}

However, since we are in the 3rd quadrant, the actual angle is:

\theta=180^{\circ} + 56.3^{\circ} = 236.3^{\circ}

So now we can find the cosine of the angle, which will be negative:

cos \theta = cos(236.3^{\circ})=-0.555

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2 years ago
Show That <br><img src="https://tex.z-dn.net/?f=%20%7Ba%20%7D%5E%7B2%7D%20%20%2B%20%20%7Bb%7D%5E%7B2%7D%20%20%3D%208" id="TexFor
Zigmanuir [339]

Answer:

Please see the attached picture for the full solution.

*From the 4th line of the 1st image, you could also expand it using

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(a -b)²= a² -2ab +b².

When squaring a fraction, square both the denominator and numerator.

➣(a/b)²= a²/b²

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3 years ago
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As a diver descends into sea water, the pressure increases by 1 atmosphere every 33 feet. The inequality below can be used to de
max2010maxim [7]
After 4 atmospheres the diver descends -132 feet because -33*4=-132
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2 years ago
Due in 15 please help!!!
Deffense [45]

Answer:

Step-by-step explanation:

its true

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2 years ago
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