jdk1605
jdk1605 jdk1605
  • 06-07-2018
  • History
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Which expression is equal to csc x, written in termsof cos x ?

Which expression is equal to csc x written in termsof cos x class=

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sqdancefan
sqdancefan sqdancefan
  • 16-07-2018

Two trig identities are of interest here:

... sin(x)² + cos(x)² = 1

... csc(x) = 1/sin(x)


Using the first one, you can subtract cos(x)², the take the square root to find

... sin(x) = ±√(1 - cos(x)²)


Using that in the second one, you have

... csc(x) = ±1/√(1 - cos(x)²) . . . . . . . . . . . . . matches the 3rd choice

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renteriam1805 renteriam1805
  • 28-05-2021

Answer:

c

Explanation:

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