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1)[tex] \frac{sin 40^{0} -cos 40^{0} }{ \sqrt{2}*cos 85^{0} } [/tex]
2)[tex] \frac{sin^{4}\frac{\pi}{9}-cos^{4}\frac{\pi}{9}}{2 cos^{2} \frac{ \pi }{9} } [/tex]
1)[tex] \frac{sin 40^{0} -cos 40^{0} }{ \sqrt{2}*cos 85^{0} } [/tex]
2)[tex] \frac{sin^{4}\frac{\pi}{9}-cos^{4}\frac{\pi}{9}}{2 cos^{2} \frac{ \pi }{9} } [/tex]
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