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4(sin⁴ 30° + cos⁴ 60°)-3(cos² 45° – sin² 90°)+5 cos² 90° |
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Answer» Step-by-step EXPLANATION: sin30=1/2 cos60=1/2 cos45=1/sqrt(2)=sin45 sin90=1 cos90=0 now =4(2/16)-3(-1/2) =1/2+3/2 =2 |
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