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[Hoang_kang]

$\sqrt{2}.\cos{\left(\dfrac{x}{5}- \dfrac{\pi}{12} \right)}- \sqrt{6}.\sin{\left(\dfrac{x}{5}- \dfrac{\pi}{12} \right)}=2\sin{\left(\dfrac{x}{5}- \dfrac{2 \pi}{3} \right)}-2\sin{\left(\dfrac{3x}{5}+\dfrac{\pi}{6} \right)}$

Mod : Nhắc nhở bạn nên học gõ Latex trước khi post bài.

Edited by dark templar, 21-06-2011 - 09:17.