作业帮sin²30°+cos²45°+✔2sin60°×tan45°
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sin²30°+cos²45°+✔2sin60°×tan45°
sin²30°+cos²45°+✔2sin60°×tan45°
sin²30°+cos²45°+✔2sin60°×tan45°
sin²30°+cos²45°+✔2sin60°×tan45°
=1/4+1/2+√2*√3/2*1
=3/4+√6/2