Mathematics
Junior High
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90°-0の三角比
sin(90°-0)=cosé
cos (90°-6)=sinθ
1
tan (90°-0)=-
tan 0
たとえば右図で, sin(90°-6)=D=cosé.
C
180°-0の三角比
sin(180°-0)=sin0
cos (180°-6)=Icos0
tan (180°-6)=Itan0
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