QUIZ #5 – SOLUTIONS
1)
Page 784, Problem 16
cos
θ
=
a
⋅
b
a
b
=
5
2 5
( )
=
1
2
⇒
θ
=
π
3
=
60
2)
Page 785, Problem 34
cos
2
α
+
cos
2
β
+
cos
2
γ
=
1
⇒
cos
2
γ
=
1
−
cos
2
α
−
cos
2
β
=
1
−
1
2
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- Spring '11
- garrison
- Calculus
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