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Prove that: sin36^0s in 72^0s in 108^0s ...

Prove that: `sin36^0s in 72^0s in 108^0s in 144^0=5/(16)dot`

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`sin 36° sin 72° sin 108° sin 144°`

= `sin 36° sin 72° sin(180° – 72°) sin(180° – 36°)`

= `sin 36° sin 72° sin 72° sin 36°`

= `(sin 36°)2 (sin 72°)^2`

...
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