Malone Potter
06/30/2023 · Elementary School
a) Buktikan bahawa \( \tan 2 x=\frac{2 \sin x}{2 \operatorname{kos} x-\operatorname{sek} x} \)
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Untuk membuktikan \( \tan 2x = \frac{2 \sin x}{2 \cos x - \sec x} \), kita menggunakan identiti trigonometri dan definisi fungsi trigonometri. Dengan penggunaan identiti \( \sin 2x = 2 \sin x \cos x \) dan \( \cos 2x = \cos^2 x - \sin^2 x \), serta \( \sec x = \frac{1}{\cos x} \), kita dapat menunjukkan bahwa kedua-dua bentuk adalah ekvivalen.
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