化简:sin780°cos1110°+cos(-660°)sin(-690°)+tan585°cos1440°
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化简:sin780°cos1110°+cos(-660°)sin(-690°)+tan585°cos1440°化简:sin780°cos1110°+cos(-660°)sin(-690°)+tan58
化简:sin780°cos1110°+cos(-660°)sin(-690°)+tan585°cos1440°
化简:sin780°cos1110°+cos(-660°)sin(-690°)+tan585°cos1440°
化简:sin780°cos1110°+cos(-660°)sin(-690°)+tan585°cos1440°
sin(2x360+60)cos(3x360+30)+cos(-2x360+60)sin(-2x360+30)+tan(360+225)cos(4x360)
=sin60cos30+cos60sin30+tan(180+45)
=√3/2 x √3/2+1/2 x 1/2 - √2/2
=1-√2/2
化简:sin780°cos1110°+cos(-660°)sin(-690°)+tan585°cos1440°
sin(-1320°)cos1110°的值
sina(-1770°)×cos1500°+cos(-690°)×sin780°+tan405°=
下列各三角函数值:1、cos9π/4;2、sin780°;3、tan(-7π/6)
sin(-1320°)、cos1110°、cos(-1020°)、sin750°、tan495°等于多少
求值 sin(-1320°)cos1110°+cos(-1020°)sin750°+cos495°
sin(-1320°)cos1110°+cos(-1020°)sin750°+tan495°
求下列各三角函数值:1、cos9π/4;2、sin780°;3、tan(-7π/6).
计算不太明白...求值sin(-1320°)*cos1110°+cos(-1020°)sin750°+tan(-405°)求值sin25π/6+cos25π/3+tan25π/4+sin7π/3*cos13π/6-cos5π/3
sin(-1395)cos1110+cos(-1020)sin750
高一数学sin(-1770)*cos1500+cos(-690)*sin780+tan405
求值:sin(-1350)cos1110+cos(-1020)sin750+tan405
求sin(-1320)cos1110+cos(-1020)sin750的值
sin(-1320)cos1110+cos(-1020)sin750+tan495的值.
sin(-1380`)cos1110`+ cos(-1020`)sin750`+tan495`求过程
sin-1320度cos1110度+cos-1020度sin750度+tan495度=?
问一道数学题 sin(-1320)乘以cos1110+cos(-1020)乘以sin720,最后再加上tan495,等于?
22°C-26°C英文翻译