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sin45°cos30°-sin30°cos45°​

Răspuns :

sin45°cos30°-sin30°cos45°=

[tex] = \frac{ \sqrt{2} }{2} \times \frac{ \sqrt{3} }{2} - \frac{1}{2} \times \frac{ \sqrt{2} }{2} [/tex]

[tex] = \frac{ \sqrt{6} }{4} - \frac{ \sqrt{2} }{4} [/tex]

[tex] = \frac{1}{4} ( \sqrt{6} - \sqrt{2} )[/tex]