Find the six trigonometric functions if cosθ=(-5/7) and π<θ<2π.

use unit circle.
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1 Answer

me assume yu tri tu sae

kosine(x)=-(5/7)=-0.7142857142857142857...

x=+135.58469140497863 deg

sine(135.584...)=0.6998542121966927

tan(...)=sine/kosine=-0.71428571... / 0.6998542121966927=-1.02062072618615
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