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\frac{1}{2 \cdot 0.2679491924311227} \sqrt{20} - 1
Evaluate trigonometric functions in the problem
\frac{1}{0.5358983848622454}\sqrt{20}-1
Whakareatia te 2 ki te 0.2679491924311227, ka 0.5358983848622454.
\frac{10000000000000000}{5358983848622454}\sqrt{20}-1
Whakarohaina te \frac{1}{0.5358983848622454} mā te whakarea i te taurunga me te tauraro ki te 10000000000000000.
\frac{5000000000000000}{2679491924311227}\sqrt{20}-1
Whakahekea te hautanga \frac{10000000000000000}{5358983848622454} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 2.
\frac{5000000000000000}{2679491924311227}\times 2\sqrt{5}-1
Tauwehea te 20=2^{2}\times 5. Tuhia anō te pūtake rua o te hua \sqrt{2^{2}\times 5} hei hua o ngā pūtake rua \sqrt{2^{2}}\sqrt{5}. Tuhia te pūtakerua o te 2^{2}.
\frac{5000000000000000\times 2}{2679491924311227}\sqrt{5}-1
Tuhia te \frac{5000000000000000}{2679491924311227}\times 2 hei hautanga kotahi.
\frac{10000000000000000}{2679491924311227}\sqrt{5}-1
Whakareatia te 5000000000000000 ki te 2, ka 10000000000000000.