Chapter 1: Limits
Section 1.4: Limits for Trig Functions
Justify the expression for the area of triangle POB in Table 1.4.2.
The area of triangle POB is half the base times the height. The base is x=cosθ and the height is y=sinθ. Hence, the area of triangle POB is =12cos⁡θ⁢sin⁡θ.
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