Sin 7π/6怎么算 求过程sin7π/6怎么分解开?

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Sin7π/6怎么算求过程sin7π/6怎么分解开?Sin7π/6怎么算求过程sin7π/6怎么分解开?Sin7π/6怎么算求过程sin7π/6怎么分解开?sin7π/6=sin(π+π/6)=-si

Sin 7π/6怎么算 求过程sin7π/6怎么分解开?
Sin 7π/6怎么算 求过程
sin7π/6怎么分解开?

Sin 7π/6怎么算 求过程sin7π/6怎么分解开?
sin7π/6=sin(π+π/6)
=-sinπ/6
=-1/2

sin7π/6=-sinπ/6=-1/2

sin(π+π/6)=sinπ/6=0.5

sin7π/6=sin(π+π/6)=-sinπ/6
sinπ/6=0.5
所以sin7π/6=-0.5