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Specification · 2020. 4. 6. · 2 tan 1 —tan 2 4 sin 700 sec 700 sin 2x cos 2x tan 2x 2 sin x cos x cos2 x — sin2 x 2 cos2 x — 1 1 — 2 sin2 x 2 tan x 1 — tan2 x Double
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