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Tynos
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Help on this please, much appreciated!
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lmsavk
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(Original post by Tynos)
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Help on this please, much appreciated!
How can you rewrite tan and what does it have in common with the other function?
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Sinfire
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Think of an identity you could square (or cleverly factorise the current equality)
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Notnek
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If you rearrange and leave the 1 on the RHS, your LHS is of the form

\displaystyle x^2+y^2-2xy

which can be factorised..
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Tynos
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Thank you all.
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