Extending Trigonometric Functions with Unit Circle
Precalculus · Flashcards
PRECALCULUS · FLASHCARDS
Card 1
of 34
0 got it
0 to review
Current
Got it
Still learning
Not seen
QUESTION
What is the reference angle for
θ
=
7
π
6
\theta=\frac{7\pi}{6}
θ
=
6
7
π
?
QUESTION
Identify the exact value of
cos
(
−
π
3
)
\cos\left(-\frac{\pi}{3}\right)
cos
(
−
3
π
)
using unit-circle symmetry.
QUESTION
At which angles is
tan
θ
\tan\theta
tan
θ
undefined on the unit circle?
Tap to flip before you grade
ANSWER
θ
=
π
2
+
k
π
\theta=\frac{\pi}{2}+k\pi
θ
=
2
π
+
k
π
, for integers
k
k
k
. Where
cos
θ
=
0
\cos\theta = 0
cos
θ
=
0
, making division undefined.
Swipe → got it · swipe ← still learning
Got it
Still learning
Flip Card
Previous card
Next card