Prove that :sin 35^{\circ} \, sin 55^{\circ} \, - \, cos 35^{\circ | Filo
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Introduction to Trigonometry

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Prove that :

Solution: L.H.S. =

L.H.S. = 

L.H.S. =          

L.H.S. = 0 = R.H.S.
Hence proof
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