求值 cos25/3π+tan(-15/4π)
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求值cos25/3π+tan(-15/4π)求值cos25/3π+tan(-15/4π)求值cos25/3π+tan(-15/4π)cos25/3*π+tan(-15/4*π)=cos(8+1/3)π
求值 cos25/3π+tan(-15/4π)
求值 cos25/3π+tan(-15/4π)
求值 cos25/3π+tan(-15/4π)
cos25/3*π+tan(-15/4*π)
=cos(8+1/3)π+tan(4-1/4)π
=cos(1/3 *π)+tan(-1/4 *π)
=1/2 -1=-1/2
求值 cos25/3π+tan(-15/4π)
求值 cos25/3π+tan(-15/4π)
求值:sin4派/3×cos25派/6×tan(-3派/4)
三角函数的计算题目cos25/3*π=tan(-15/4*π)
求值,sin25∏/6 cos25∏/3 tan(-4∏/3)
sin25π/6+cos25π/3+tan(-25π/4)
求值sin25π/6+cos25π/3+tan(-25π/4)+sin(-7π/3)×cos(-13π/6)-sin(-5π/6)×cos(-5π/3)
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
计算:sin25π/6+cos25π/4+tan(-25π/4)+sin(-26π/3)
sin25π/6 + cos25π/3 + tan(-25π/4)这题怎么算?
求sin25π/6+cos25π/3+tan(-25π/4)的值?
计算,sin25π/6+cos25π/3+tan(-25π/4)
sin25π/4+cos25π/3+tan(-25π/4)=
Sin25派/6+Cos25派/3+tan(-25派/4) 计算题
sin25/6pai+cos25/3pai+tan(-25/4pai)
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先估计结果的符号,再进行计算sin25π/6+cos25π/3+tan(- 25π/4)