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Ecuaciones Trigonometricas 1 Bachillerato Review

Find ( k ) for ( 0 \le x < 2\pi ): ( k=0 \to \pi/8 ) ( k=1 \to \pi/8 + \pi/2 = 5\pi/8 ) ( k=2 \to 9\pi/8 ) ( k=3 \to 13\pi/8 ) ( k=4 \to 17\pi/8 = 2\pi + \pi/8 ) (too large).

Let ( t = 2x ). Solve ( \tan t = 1 ). Principal value: ( t = \pi/4 ). Tangent period is ( \pi ): ( t = \pi/4 + k\pi ). Thus ( 2x = \pi/4 + k\pi \Rightarrow x = \pi/8 + k\pi/2 ). ecuaciones trigonometricas 1 bachillerato

Case 1: ( \sin x = 0 \Rightarrow x = 0, \pi ) in ( [0, 2\pi) ). Case 2: ( \cos x = 1/2 \Rightarrow x = \pi/3,\ 5\pi/3 ) in ( [0, 2\pi) ). Find ( k ) for ( 0 \le

With practice, solving trigonometric equations becomes systematic. Memorize the general solution forms and always check your solutions in the original equation. Principal value: ( t = \pi/4 )

Find ( k ) for ( 0 \le x < 2\pi ): ( k=0 \to \pi/8 ) ( k=1 \to \pi/8 + \pi/2 = 5\pi/8 ) ( k=2 \to 9\pi/8 ) ( k=3 \to 13\pi/8 ) ( k=4 \to 17\pi/8 = 2\pi + \pi/8 ) (too large).

Let ( t = 2x ). Solve ( \tan t = 1 ). Principal value: ( t = \pi/4 ). Tangent period is ( \pi ): ( t = \pi/4 + k\pi ). Thus ( 2x = \pi/4 + k\pi \Rightarrow x = \pi/8 + k\pi/2 ).

Case 1: ( \sin x = 0 \Rightarrow x = 0, \pi ) in ( [0, 2\pi) ). Case 2: ( \cos x = 1/2 \Rightarrow x = \pi/3,\ 5\pi/3 ) in ( [0, 2\pi) ).

With practice, solving trigonometric equations becomes systematic. Memorize the general solution forms and always check your solutions in the original equation.

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