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4(sin^4 30 + cos^4 60 ) - 3(cos^2 45 - sin square 90) + 5cos square 90 |
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Answer» Step-by-step explanation: 4(sin⁴30°+cos⁴60)-3(cos²45°-sin²90°)+5cos²90 4{(1/2)⁴ +(1/2)⁴ -3{(1/√2)² -(1)² +5×0 4{(1/8)-3(-1/2) 4/8+3/2 because 4/8=1/2 so 1/2+3/2 4/2 2 |
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