tan60°-2cos45°+sin25°² +sin65°²-3tan30°²-根号二tan10° ×tan80°
=根号3-2*根号2/2+cos65°² +sin65°²-3(根号3/3)²-根号二cot80° ×tan80°
=根号3-*根号2+1-1-根号二
=根号3-2*根号2
tan60°-2cos45°+sin25°² +sin65°²-3tan30°²-根号二tan10° ×tan80°
=根号3-2*根号2/2+cos65°² +sin65°²-3(根号3/3)²-根号二cot80° ×tan80°
=根号3-*根号2+1-1-根号二
=根号3-2*根号2