Funky Trigonometric Expression

Geometry Level 2

Find the value of

cos475+sin475+3sin275cos275cos675+sin675+4sin275cos275.\frac{\cos^4 75^{\circ}+\sin^4 75^{\circ}+3\sin^2 75^{\circ}\cos^2 75^{\circ}}{\cos^6 75^{\circ}+\sin^6 75^{\circ}+4\sin^2 75^{\circ}\cos^2 75^{\circ}}.

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