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Eliminate theta from the following. cose...

Eliminate `theta` from the following. `cosectheta-sintheta=a^3`, `sectheta-costheta=b^3`

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`1/sintheta-sintheta=a^3`
`sin^2theta+a^3sintheta=1-(1)`
`1/costheta-costheta=b^3`
`cos^2theta+b^3costheta=1-(2)`
adding equation 1 and 2
`1+a^3sintheta+b^3costheta=2`
`b^3costheta=1-a^3sintheta`
`b^6(1-sin^2theta)=(1-a^3sintheta)^2`
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