Explain how reference angles are used to find trigonometric functions of an obtuse angle.?
回答 (1)
2016-08-26 1:30 am
sin(180-x)=sinx
cos(180-x)=-cosx
tna(180-x) = -tanx
cos(180-x)=-cosx
tna(180-x) = -tanx
收錄日期: 2021-04-21 21:25:27
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