Question 3 Suppose f(x,y,t) = t cos(tx + 2 y²) and x(t) and y(t) are differentiable functions such that dx x(2) = 0.6246, (2) = 0.9223, dt dy y(2) = 0.7300, ·(2) = 0.5749. dt df Then the value of sin A where A = at t = 2 is dt 0.957 O 0.197 0.174 -0.671 -0.440 -0.399 -0.477 -0.857 1 pts

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