. B, U = ASIN ( 4T - Π ). D, U = ASIN ( 4T - Π
3
).
b, u = asin ( 4t -
π
).
d, u = asin ( 4t -
π
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3
).
b, u = asin ( 4t -
π
).
d, u = asin ( 4t -
π