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Evaluation and Approximation

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1. Establish the identity:sin(theta+3pi/2)=-cos(theta) 2. Find the exact value of 2(theta) if sin(theta)=5/13 3. Show that:
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2. asked by Brittany
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If f, of, xf(x) is an exponential function where f, of, 4, equals, 17f(4)=17 and f, of, 12, point, 5, equals, 31f(12.5)=31, then
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2. asked anonymously
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