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igomit [66]
2 years ago
15

If sin(t) = 3/5 and t is in the 2nd quadrant, find cos(t).

Mathematics
1 answer:
NemiM [27]2 years ago
5 0

Cosine is \frac{hypotenuse}{adjacent}.

Apply the equation:

sin(t) = \frac{3}{5} \\3^2 + b^2 = 5^2\\b^2 = 5^2 - 3^2\\\\\sqrt{b^2}  = \sqrt{5^2}- \sqrt{3^2}\\\\\\b = 5 - 3 \\\\b = 2

B is the adjacent side so

cosine is:

Cos(t) = 5/2

Have a great day,

And I hope this helps you!

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Answer:

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Step-by-step explanation:

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\sqrt{a} = a^{0.5}

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This following property is also important:

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3 years ago
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