Angle between vectors, Acos(a b – HP 35s Scientific Calculator User Manual
Page 155
10-5
Angle between vectors
The angle between two vectors, A and B, can be found as
θ
=
ACOS(A B/
)
Find the angle between two vectors: A=[1,0],B=[0,1]
Find the angle between two vectors: A=[3,4],B=[0,5]
Presses
for dot product
,and the dot product of two
vectors is 28
Keys:
Display:
Description:
9
()
Switches to ALG mode
9
()
Sets Degrees mode
Arc cosine function
3
Õ
Enters vector A [1,0]
3
Õ
Enters vector B [0,1] for dot
product of A and B
3
Õ
Finds the magnitude of
vector A [1,0]
3
Finds the magnitude of
vector B [0,1]
The angle between two
vectors is 90
Keys:
Display:
Description:
9
()
Switches to RPN mode
9
()
Sets Degrees mode
3
3
Finds the dot product of
two vectors
3
Finds the magnitude of
vector [3,4]
B
A