How do I find the max value and the unknown variables of f=-cos(the​ta_A).*cos​(theta_B)-​sin(theta_​A).*sin(th​eta_B).*si​n(phi_A).*​sin(phi_B)​-cos(phi_A​).*cos(phi​_B).*sin(t​heta_A).*s​in(theta_B​)

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Raja Emlik
Raja Emlik 2015-7-15
评论： Torsten 2015-7-23
Where theta_A, theta_B, phi_A, phi_B are unknown variables. So i put the range for theta =0:0.01:pi and phi =0:0.01:2*pi. Please tell me how to put the code , i would be appreciate. Thanks

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回答（2 个）

Torsten
Torsten 2015-7-16
help fminsearch help fminunc help fminbnd
Best wishes
Torsten.
Torsten
Torsten 2015-7-16
One solution is
theta_A=pi, theta_B=phi_A=phi_B=0
Best wishes
Torsten.
  2 个评论
Raja Emlik
Raja Emlik 2015-7-23
Hi How they are 0? As i need to find max value which should be 2*sgrt(2). Could you please tell me the right command how to find the max value of multi-variable function. Thanks so much.
Torsten
Torsten 2015-7-23
As far as I can see, your expression can never exceed the value of 1, and this value is attained for theta_A=pi, theta_B=phi_A=phi_B=0.
But you can test this using one of the MATLAB tools I mentionned in my first response.
Best wishes
Torsten.

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