(1/sin10)-(√3/cos10)
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(1/sin10)-(√3/cos10)(1/sin10)-(√3/cos10)(1/sin10)-(√3/cos10)1/sin10°)-(√3)/cos10°=(cos10°)-(√3)sin10
(1/sin10)-(√3/cos10)
(1/sin10)-(√3/cos10)
(1/sin10)-(√3/cos10)
1/sin10°)-(√3)/cos10°
=(cos10°)-(√3)sin10°)/(sin10°×cos10°)
=2(1/2 cos10°-(√3)/2 sin10°))/(sin10°×cos10°
=2(sin30°cos10°-cos30°sin10°)/(sin10°×cos10°)
=2sin20°/(sin10°×cos10°)
=4sin20°/(2sin10°×cos10°)
=4sin20°/sin20°
=4
(1/sin10)-(√3/cos10)
化简,1/sin10-√3/cos10
求值:1/sin10-√3/cos10
cos10`+(√3)sin10'除以(√1-cos80')=?
(cos10度+√3sin10度)/√(1-cos80度)
化简1/sin10°-√3/cos10°
化简 1/sin10°-√3/cos10°
1/sin10° +√3/cos10°=
化简1/sin10°-√3/cos10°,
求值;1/sin10°-√3/cos10°.
求值.1/sin10°-√3/cos10°
(1/sin10º)-√3/cos10º=等于4,
1、求证:cos40°(cos10°+√3 sin10°)=cos10°
cos10度+√3sin10度=
sin10°-√3cos10°
三角恒等变换 cos10°-√3sin10°/sin10°cos10°
求(1÷sin10÷sin10-3÷cos10÷cos10)÷cos20
为什么sin50(cos10+√3sin10)/cos10=sin50*2sin(10+30)/cos10