Evaluate -beginvmatrix cos 15-circ- sin 15 -circllsin 75- -circ - cos 75- lcirclend vmatrix A- 1B- 0C- 2D- 3

Cos15^∘ amp;sin15 ^∘ sin75^∘ amp;cos 75^∘ nbsp; =cos15^∘cos75^∘ sin15^∘sin75^∘ =cos(15^∘+75^∘)=cos90^∘=0 ...

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Evaluate $∣ ∣ ∣ \begin{matrix} cos 15^{\circ} & sin 15^{\circ} sin 75^{\circ} & cos 75^{\circ} \end{matrix} ∣ ∣ ∣$

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