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sin 45 grade:(cos30grade-tg30grade)=


Multumesc!


Răspuns :

sin 45° = [tex]\frac{\sqrt{2} }{2}[/tex]

cos 30° = [tex]\frac{\sqrt{3} }{2}[/tex]

tg 30° = [tex]\frac{\sqrt{3} }{3}[/tex]

tot ce trb sa faci este sa inlocuiesti si faci calculul!

bafta!

sin 45°=[tex] \frac{1}{2} [/tex]

cos 30°=[tex] \frac{ \sqrt{3} }{2} [/tex]

tg 30°=[tex] \frac{ \sqrt{3} }{3} [/tex]

[tex] \frac{1}{2} \div ( \frac{ \sqrt{3} }{2} - \frac{ \sqrt{3} }{3} ) = \\ = \frac{1}{2} \div \frac{ \sqrt{3} }{2} - \frac{1}{2} \div \frac{ \sqrt{3} }{3} = \\ = \frac{1}{2} \times \frac{2}{ \sqrt{3} } - \frac{1}{2} \times \frac{ \sqrt{3} }{3} = \\ = \frac{1}{ \sqrt{3} } - \frac{ \sqrt{3} }{6} = \\ = \frac{ \sqrt{3} }{3} - \frac{ \sqrt{3} }{6} = \\ = \frac{2 \sqrt{3} }{6} - \frac{ \sqrt{3} }{6} = \\ = \frac{ \sqrt{3} }{6} [/tex]