[" If "10sin^(4)alpha+15cos^(4)alpha=6" ...

[" If "10sin^(4)alpha+15cos^(4)alpha=6" and the value of "9csc^(4)alpha+beta sec^(4)alpha" is "S," then find the value of "(S)/(25)" ."],[" 6.The value of "(1+tan(3 pi)/(8)tan(pi)/(8))+(1+tan(5 pi)/(8)tan(3 pi)/(8))+(1+tan(7 pi)/(8)tan(5 pi)/(8))+(1+tan(9 pi)/(8)tan(7 pi)/(8))]

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