A negative angle in the fourth quadrant
A negative angle in the fourth quadrant
5 marks
TGM Original
Find the exact values of all six trigonometric functions at -765. State any undefined values and identify the terminal quadrant or axis.
Solution:
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Answer:\(\sin(-765^\circ)=- \dfrac{\sqrt{2}}{2}\); \(\cos(-765^\circ)=\dfrac{\sqrt{2}}{2}\); \(\tan(-765^\circ)=-1\); \(\operatorname{cosec}(-765^\circ)=- \sqrt{2}\); \(\sec(-765^\circ)=\sqrt{2}\); \(\cot(-765^\circ)=-1\). Terminal quadrant IV.
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