Applying Laws of Sines and Cosines
Precalculus · Flashcards · Application
PRECALCULUS · FLASHCARDS
Card 1
of 6
0 got it
0 to review
Current
Got it
Still learning
Not seen
QUESTION
Find
sin
B
\sin B
sin
B
using the Law of Sines:
a
=
8
a=8
a
=
8
,
A
=
40
∘
A=40^\circ
A
=
4
0
∘
, and
b
=
10
b=10
b
=
10
.
QUESTION
Find
a
a
a
using the Law of Sines:
A
=
30
∘
A=30^\circ
A
=
3
0
∘
,
B
=
60
∘
B=60^\circ
B
=
6
0
∘
, and
b
=
10
b=10
b
=
10
.
QUESTION
Find
c
c
c
using the Law of Cosines:
a
=
5
a=5
a
=
5
,
b
=
7
b=7
b
=
7
, and
C
=
60
∘
C=60^\circ
C
=
6
0
∘
.
Tap to flip before you grade
ANSWER
c
=
5
2
+
7
2
−
2
(
5
)
(
7
)
cos
60
∘
c=\sqrt{5^2+7^2-2(5)(7)\cos 60^\circ}
c
=
5
2
+
7
2
−
2
(
5
)
(
7
)
cos
6
0
∘
. Apply
c
2
=
a
2
+
b
2
−
2
a
b
cos
C
c^2=a^2+b^2-2ab\cos C
c
2
=
a
2
+
b
2
−
2
ab
cos
C
with given values.
Swipe → got it · swipe ← still learning
Got it
Still learning
Flip Card
Previous card
Next card