SOLUTION: If σ is an angle in the third quadrant and csc σ = - 13/5, find the value for 3sin^2 σ-2cos σ as a fraction with no decimals.

SOLUTION: If σ is an angle in the third quadrant and csc σ = - 13/5, find the value for 3sin^2 σ-2cos σ as a fraction with no decimals.

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Question 1186336: If σ is an angle in the third quadrant and csc σ = - 13/5, find the value for 3sin^2 σ-2cos σ as a fraction with no decimals.
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
csc σ = - 13/5 ===>
===>

===> . (Cosine is negative over the 3rd quadrant.)

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