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The robot moves the particle A (mass M) in the vertical plane using polar coordinate formulas

r(t) = 1,2-0,6sin(2πt) [m]

θ(t) = 0,5-1,5cos(2πt) [rad]

in accordance with

Determine the acceleration of the object in the θ direction [m/s²] at time t0=1.9s

Use [m/s²] units

GIVE ANSWER TO THREE DECIMALS

90
120
60
15
150
30
r(t)
180
r(x)
210
330
240
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270
A(t), 4(x)

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