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Marin Combs
Mathematics
18 December, 09:15
If Sin0=3/5, then cos0=?
Apex
+4
Answers (
1
)
Kian Sampson
18 December, 09:39
0
4/5
Step-by-step explanation:
I believe you meant sin Ф = 3/5, since sin 0 = 0 (zero).
sin Ф = 3/5 = (opposite side) / (hypotenuse).
cos Ф = (adjacent side) / (hypotenuse)
Use the Pythagorean Theorem to find the length of the adjacent side:
(adj) ² + (opp) ² = (hyp) ² becomes (adj) ² = 5² - 3² = 25 - 9 = 16.
Then (adj) = + √16 = + 4
and so cos Ф = (adj) / (hyp) = 4/5
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