(UFRR) Sabendo-se que tg x = -1/3 e sen x < 0, é correto afirmar que a. cossec x = √ 3 
b. cossec x = √ 10 
c. cossec x = -√ 10 
d. cossec x = -√ 3 /2
e. cossec x = -√ 3 
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