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ollegr [7]
1 year ago
12

Help!

Mathematics
2 answers:
ValentinkaMS [17]1 year ago
8 0

Answer:

C is your correct answer

I think it will help you.

Stolb23 [73]1 year ago
6 0

Answer:

C.

Step-by-step explanation:

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a x=12/4 =3

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Read 2 more answers
: If tan A=- 9/13 and 0 < A < 180, find, without using tables or calculators, the value of
stich3 [128]

Answer:  \bold{\sin A=\dfrac{9\sqrt{10}}{50}\qquad \cos A=-\dfrac{13\sqrt{10}}{50}}

<u>Step-by-step explanation:</u>

0° < A < 180° so it is in Quadrant I or II

since tan A is negative, it is in Quadrant II ---> (-x, +y)

\text{Given}:\tan A=\dfrac{y}{x}\ =\dfrac{9}{-13}

Next, find the hypotenuse given that x = -13 and y = 9

(-13)² + (9)² = r²

         250 = r²

         5√10 = r

\sin A = \dfrac{y}{r}\quad =\dfrac{9}{5\sqrt{10}}\bigg(\dfrac{\sqrt{10}}{\sqrt{10}}\bigg)\quad =\large\boxed{\dfrac{9\sqrt{10}}{50}}\\\\\\\\\cos A = \dfrac{x}{r}\quad =\dfrac{-13}{5\sqrt{10}}\bigg(\dfrac{\sqrt{10}}{\sqrt{10}}\bigg)\quad =\large\boxed{-\dfrac{13\sqrt{10}}{50}}

8 0
3 years ago
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