sin² 30°-cos45° ×tan60°
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sin²30°-cos45°×tan60°sin²30°-cos45°×tan60°sin²30°-cos45°×tan60°sin²30°-cos45°×ta
sin² 30°-cos45° ×tan60°
sin² 30°-cos45° ×tan60°
sin² 30°-cos45° ×tan60°
sin² 30°-cos45° ×tan60°
=1/4-(√2/2)x(√3)
=1/4-√6/2
=1/4-√6/2