化简√(1-sin(1-60°))
问题描述:
化简√(1-sin(1-60°))
答
√(1-sin(1-60°))=√(1-sin2(1/2-30°))=√(1-sin(1/2-30°)cos(1/2-30°))=√(sin(1/2-30°)^2+cos(1/2-30°)^2 - sin(1/2-30°)cos(1/2-30°))=√(sin(1/2-30°)- cos(1/2-30°))^2...