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Mathematics, 28.09.2019 22:30 priarm8799

If tan x=2021
x=20/21
and
π< x < 3π/2
what is cos⁡(x+π/2)?

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If tan x=2021
x=20/21
and
π< x < 3π/2
what is cos⁡(x+π/2)?...

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