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Trignometry

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5 Apr 2008 13:12:15 IST

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related to inverse trignometric functions

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if cos^-1+cos^-1+cos^-1=3

then pt x⁶+y⁶+z⁶-9/x⁶+y⁶+z⁶=0

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salsa

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Joined: 5 Apr 2008

Posts: 1

5 Apr 2008 21:13:10 IST

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you cannot do that becoz max value of cos is pi only

arpan1

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Joined: 15 Mar 2008

Posts: 684

5 Apr 2008 21:22:17 IST

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the only value of x, y and z satisfying the given condition is x=y=z = -1

then

x⁶+y⁶+z⁶-9/x⁶+y⁶+z⁶

= 1 +1+1 - (9/3)

=0

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