Subtract 360° to get 330°.
So, -sec(690°) = -sec(330°) = 1[-cos(330°)] = -1/[√3/2] = -2/√3 = -2√3/3.
Shreyas D.
asked • 07/16/18Evaulate:- sec 690
Unit Circle I have doubt evaulate:- - sec690°
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