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\text { 3. ( } 5 \text { points) An acute angle } \alpha \text { is such that } \sec (\alpha)=\frac{9}{5} \text { . } (a) Find all trigonometric

function values of a. (b) Suppose a is measured in radians. Explain which property of pairs of trigonometric functions allow you to find all the trigonometric function values of B = n/2 - a by just using your results from part(a), without any further computations. Then, list all trigonometric function values of B.

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