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**[SOLVED] Derivatives of Trig with Triangles**

**1. Two sides of a triangle are six and eight metres in length. If the angle between them decreases at the rate of 0.035 rad/s, find the rate at which the area is decreasing when the angle between the sides of fixed length is pi/6. Answer 0.727 m^2/min**

**2. I tried using Heron's formula but I realised it was almost impossible to take the derivative somehoe with the angle needed. My givens are**

dtheta/dt = -0.035 rad/s

the angle between them is pi/6 or 30 degrees

Now to find da/dt...

dtheta/dt = -0.035 rad/s

the angle between them is pi/6 or 30 degrees

Now to find da/dt...

Thanks