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ycow [4]
3 years ago
13

PLEASE HELP!! Find the area of the triangle below

Mathematics
1 answer:
sladkih [1.3K]3 years ago
6 0

Step-by-step explanation:

I got 47.5 for this, not sure if its right though.

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Can anyone help me with trig identities?
nevsk [136]

Answer:

cosA = √(21/25)

Step-by-step explanation:

We know

sin²(A) + cos²(A) = 1

Next, we know that sin(A) = 2/5. Plugging that into our equation, we get

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4/25 + cos²A = 1

subtract 4/25 from both sides to isolate cos²A

cos²A = 1 - 4/25 = 25/25-4/25 = 21/25

square root both sides to get

cosA = √(21/25)

We do not include -√(21/25) in our possible answer for cosA because this is in quadrant 1, so cosA must be positive.

6 0
3 years ago
Which equation represents a linear equation?
AlekseyPX

Answer:

y - 2 =  - 5(x - 2)

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4 0
3 years ago
Solve for x in simplest form.<br>14 = 1/3(8x + 6)​
elena-s [515]

Answer:

x = 4.5

Step-by-step explanation:

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5 0
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Which term best describes a proof in which you assume the opposite of what you wan to prove
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Have an amazing day!

8 0
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