1/sin10°-根号3/cos10°=
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1/sin10°-根号3/cos10°=
1/sin10°-根号3/cos10°=
1/sin10°-根号3/cos10°=
1/sin10°-根号3/cos10°
=(cos10-根3*sin10)/(sin10*cos10)
=4*(sin150*cos10+sin10*cos150)/sin20
=4*sin160/sin20
=4
1/sin10°-√3/cos10°
=(cos10°-√3sin10°)/(sin10°*cos10°)
cos10°-√3sin10°
=2(1/2*cos10°-1/2*√3sin10°)
=2*(cos60°*cos10°-sin60°*sin10°)
=2*ocs(60°+10°)=2cos70°=2sin20°
sin10°*cos10°=1/2*sin20°
原式=2sin20°/(1/2*sin20°)
=4
1/sin10-√3/cos10
=2*(sin30/sin10-cos30/cos10)
=2(sin30cos10-sin10cos30)/(sin10cos10)
=4(sin(30-10))/sin20
=4
1/sin10°-根号3/cos10°=
求值:1/sin10°-根号3/cos10°=
化简sin10°-根号3*cos10°
化简1/sin10°-根号3/cos10°
化简:1/(sin10°) —根号3/cos10°
1/sin10°减去根号3/cos10°,求过程.
求1/sin10°-根号3/cos10°的值.
求值 1/sin10°-根号3/cos10°
计算1/(sin10°)-(根号3)/(cos10°)的值.
为什么 根号下1-2cos10°sin10°=根号下sin10°-cos10°的平方
化简:(cos10°+根号下3sin10°)/根号下(1-cos80°)=分子上的那个 应该是 :(cos10°+√3*sin10°)
1除以sin10°-tan30°除以1除以sin10°-根号3除以cos10
1/sin10° +√3/cos10°=
(2cos70°+根号3sin10°)/cos10°
求值:sin10°-根号3乘cos10°/cos40°
sin10°-根号3cos10°/cos40°
求(sin10°-根号3cos10°)/sin50°
求值 (cos10°+根号3sin10°)/cos50°