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emmainna [20.7K]
3 years ago
8

Please help me with my math! Thank You! :)

Mathematics
2 answers:
Luden [163]3 years ago
7 0

Answer:

cosΘ = \frac{4}{5}

Step-by-step explanation:

Using the trigonometric identity

sin²x + cos²x = 1 ⇒ cosx = ± \sqrt{1-sin^2x}

Given

sinΘ = \frac{3}{5}, then

cosΘ = ± \sqrt{1-(3/5)^2} = ± \sqrt{1-\frac{9}{25} } = ± \sqrt{\frac{16}{25} } = ± \frac{4}{5}

Since Θ is in first quadrant then cosΘ > 0

cosΘ = \frac{4}{5}

Natasha_Volkova [10]3 years ago
5 0
Then Cos would be 4/5
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