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Find sinx given cos2x=5/9

1 Answer

5 votes

Answer:

sinx = √2/3

Explanation:

cos2x = 1-2sin²x

5/9 = 1-2sin²x

2sin²x =1-5/9

2sin²x = 4/9

sin²x = (4/9)/2

sin²x = (4/9)*(1/2)

sin²x = 2/9

sinx = √2/3

User Wimalopaan
by
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