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• Trigonometry
• The Unit Circle Tests
• Signs of trigonometric function

# Signs of trigonometric function

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•  Question 1: 1 pts Use the unit circle to determine the sign of $sin50^\circ$
 positive negative
•  Question 2: 1 pts Use the unit circle to determine the sign of $\cos130^\circ$
 positive negative
•  Question 3: 1 pts Use the unit circle to determine the sign of $\tan220^\circ$
 positive negative
•  Question 4: 2 pts Which of following has positive sign.
 $\sin300^\circ$ $\cos300^\circ$ $\tan300^\circ$ $\cot300^\circ$
•  Question 5: 2 pts Use the unit circle to determine the sign of $\sin(-100^\circ)$
 positive negative
•  Question 6: 2 pts Use the unit circle to determine the sign of $\cot(-210^o)$.
 positive negative
•  Question 7: 2 pts In which quadrant do the most trigonometric functions have positive signs?
 first second third fourth
•  Question 8: 3 pts In which quadrant two trigonometic functions have negative signs?
 first second third fourth
•  Question 9: 3 pts If $\sin(\alpha)<0$ and $\cos(\alpha)>0$ than the angle $\alpha$ belongs to:
•  Question 10: 3 pts If $\tan(\alpha)<0$ and $\sin(\alpha)>0$ than the angle $\alpha$ belongs to:
 $\sin({\frac{4\pi}3})$ $\cos({-\frac{\pi}3})$ $\tan({\frac{5\pi}4})$
•  Question 12: 3 pts Which value in the following group has different sign than $\tan({\frac{2\pi}3})$?
 $\cos({\frac{2\pi}3})$ $\sin({\frac{2\pi}3})$ $\cot({\frac{2\pi}3})$