If cos θ=−8/17 and 180°θ < 270°, what is sin θ?
2 answers:
Answer:
sinΘ = - 
Step-by-step explanation:
Using the trigonometric identity
sin²x + cos²x = 1
⇒ sinx = ± 
Since 180 < Θ < 270 then sinΘ < 0
sinΘ = - 
= - 
= -
= - 
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