the tips of the blade of a pair of scissors bare 8.6 cm apart and the angle between the blades is 38° . how long is each blade to the point where they meet?
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The derivative you are after is x˙=dxdt From the information in the question, you can find x as a function of θ, and you are given that θ˙=50∘sec. So once to you figure out x in terms of θ, just apply the chain rule.
To find x in terms of θ, remember that the angles of a triangle add up to 180∘, and apply the Law of Sines.
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