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Sin30 + cos30 supra ctg45 + tg60=?

Răspuns :

[tex] \frac{ \frac{1}{2} + \frac{ \sqrt{3} }{2} }{1+ \sqrt{3} } = \frac{ \sqrt{3} +1}{2} * \frac{1}{1+ \sqrt{3} } = \frac{1}{2} [/tex]