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hope it helps you guys IF U like it please mark as brainlest nd follow me GUYSS
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6
Step-by-step explanation:
cos²π/4-cos²π/6+sin⁴π/6+sin⁴π/3
=cos²45°-cos²30°+sin⁴30°+sin⁴60°
=(½)²-(√3/2)²+(½)⁴+(√3/2)⁴
=½ - ¾ + 1/16 + 9/16
= 8-12+1+9
16
=6
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