化简sin10°-根号3*cos10°

问题描述:

化简sin10°-根号3*cos10°

解sin10°-根号3*cos10°
=sin10°-√3*cos10°
=2(1/2sin10°-√3/2*cos10°)
=2(cos60°sin10°-sin60°*cos10°)
=2cos(60°+10°)
=2cos(70°)