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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:
    first quadrant
    second quadrant
    third quadrant
    fourth quadrant
  • Question 10:
    3 pts
    		If $\tan(\alpha)<0$ and $\sin(\alpha)>0$ than the angle $\alpha$ belongs to:
    first quadrant
    second quadrant
    third quadrant
    fourth quadrant
  • Question 11:
    3 pts
    		Which value in the following group has different sign from the others?
    $\sin({\frac{4\pi}3})$
    $\cos({-\frac{\pi}3})$
    $\tan({\frac{5\pi}4})$
  • Question 12:
    3 pts
    		Which value in the following group has different sign than $\tan({\frac{2\pi}3})$?
    $\cos({\frac{2\pi}3})$
    $\sin({\frac{2\pi}3})$
    $\cot({\frac{2\pi}3})$

Angle Measurement

Right triangle

Unit circle

Trigonometric identities