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1 tháng 7 2021
50) \(\sqrt{98-16\sqrt{3}}=4\sqrt{6}-\sqrt{2}\)
51) \(\sqrt{2-\sqrt{3}}=\dfrac{\sqrt{4-2\sqrt{3}}}{\sqrt{2}}=\dfrac{\sqrt{3}-1}{\sqrt{2}}=\dfrac{\sqrt{6}-\sqrt{2}}{2}\)
52) \(\sqrt{4+\sqrt{15}}=\dfrac{\sqrt{8+2\sqrt{15}}}{\sqrt{2}}=\dfrac{\sqrt{5}+\sqrt{3}}{\sqrt{2}}=\dfrac{\sqrt{10}+\sqrt{6}}{2}\)
53) \(\sqrt{5-\sqrt{21}}=\dfrac{\sqrt{10-2\sqrt{21}}}{\sqrt{2}}=\dfrac{\sqrt{14}-\sqrt{6}}{2}\)
54) \(\sqrt{6-\sqrt{35}}=\dfrac{\sqrt{12-2\sqrt{35}}}{\sqrt{2}}=\dfrac{\sqrt{14}-\sqrt{10}}{2}\)
55) \(\sqrt{2+\sqrt{3}}=\dfrac{\sqrt{4+2\sqrt{3}}}{\sqrt{2}}=\dfrac{\sqrt{6}+\sqrt{2}}{2}\)
56) \(\sqrt{4-\sqrt{15}}=\dfrac{\sqrt{8-2\sqrt{15}}}{\sqrt{2}}=\dfrac{\sqrt{10}-\sqrt{6}}{2}\)
8 tháng 10 2016
9342 chắc chắn 100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%
AG
29 tháng 5 2019
sin 24 độ , cos 70 độ (=sin 30 độ) ,sin 54 độ , cos 35 độ (=sin 55 độ ) , sin78 độ.
sin =90-cos ; cos =90-sin bạn nha!!
Chúc bạn học tốt!!
28 tháng 3 2021
* Tham khảo :
[1-10] Fill each blank with a suitable word to complete the passage.
Many countries regard income first and foremost (1) ____as_ the primary means of determining their success in (2) ___by__ with other country. The measure divides the value of a country’s annual production (3) __comparison___ the number of people resident in the country. In 1998, however, the King of Bhutan announced that in the future his nation’s main measure of success would be happiness (4) _rather___ than income. He did this with a (5) _view____ to showing the world that money does not (6) __buy___ happiness.
A year later, the King had the fateful decision to allow television into his country. Until then, it had been banned, as (7) _almost____ all forms of advertising. But in 1999, TV sets began to be imported into the country and, as a result, people started to spend a lot of time watching television programmes. Around the (8) _same____ time, children began fighting more, crime (9) __increased___ and more (10) ___maried__ couples separated or divorced.
6 tháng 12 2021
sắp thi rùi zzzzzzzzzzzzzzz nên học đêm em có khả năng thức đêm
15023840952234 cau tra loi do ba noi a kkkk
ấn máy tính là xong ko phải tính