Examples and Practice Test (with Solutions)
Example: cosx + sinx = 0 method 1 square both sides cos2x + 2sinxcosx + sin 2 x 2sinxcosx sin(2x) OR method 2 use trig quotient identity... Solving Trig Equations: Techniques To solve by graphing, find the intersections of cosx and —sinx cosx + sinx = O cosx -smx cosx smx cosx smx smx cosx tanx and Example: tan sm cos 270, 630, etc.. 135, 315, . ................
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