Объяснение:
II(+) II(-)
sin(180⁰-d)+cos(90⁰+d)=sind-sind=0
III(+) I(+)
ctg(270⁰-d)-tg(360⁰+d)=tgd-tgd=0
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Объяснение:
II(+) II(-)
sin(180⁰-d)+cos(90⁰+d)=sind-sind=0
III(+) I(+)
ctg(270⁰-d)-tg(360⁰+d)=tgd-tgd=0