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Topic: Using Solve/FSolve for Multiple Trig Equations
Replies: 7   Last Post: May 4, 2013 8:44 AM

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Jung

Posts: 1
Registered: 5/1/13
Using Solve/FSolve for Multiple Trig Equations
Posted: May 1, 2013 12:16 PM
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Hello,

I am trying to solve for:
y
r
p

in the following equations where I, J, K are known.

I = siny * sinr + cosy * sinp * cosr
J = -siny * cosr + cosy * sinp * sinr
K = cosy * cosp

The code I have used is:

syms r p y i j k

S = solve(i == sin(y)*sin(r)+cos(y)*sin(p)*cos(r), j == -sin(y)*cos(r)+cos(y)*sin(p)*sin(r), k == cos(y)*cos(p))
S.r
S.p
S.y

but I cannot seem to get a result.

Any help would be appreciated.

Thank you,



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