Вычислите:
1) cos45° • sin45° ;
2) sin60° • tg30° ;
3) √3 cos 30° - cos 60° .
1) cos45° • sin45° ;
2) sin60° • tg30° ;
3) √3 cos 30° - cos 60° .
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Объяснение:
1) √2/2 *√2/2 = 1/2;
2) √3/2 * 1/√3 = 1/2;
3) √3*(√3/2) - 1/2 = 1.