Asked by Mark

24. Let cscθ = 5 with θ ∈QII and find the following.
*use double identity
a) cosθ b) cotθ
Answered by Steve
No idea what a double identity is, but draw the triangle. The missing side is √24. In QII, that means x is negative, so

cosθ = x/r = -√24/5
cotθ = x/y = -√24/1
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