Pernyataan yang benar di bawah ini:
(1) \(\sin^2 15^{\text{o}} - \cos^2 15^{\text{o}} = \dfrac 12 \sqrt{3}\)
(2) \(\dfrac {\tan 17^{\text{o}} - \tan 2^{\text{o}}}{1 + \tan 17^{\text{o}} \:.\: \tan 2^{\text{o}}} = 2 - \sqrt{3}\)
(3) \(\cos 96^{\text{o}} + \tan 48^{\text{o}} \:.\: \sin96^{\text{o}} = 1\)
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