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Pro Problems > Math > Algebra > Functions

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Two time-based arithmetic series combined at different rates
An arithmetic series problem involving overdue library books
Find the first term, given information about the infinite sum and a partial sum
Solve the problem involving an isosceles triangle embedded in a right triangle
Fractional sine, cosine, and tangent functions, in terms of the variable a
Simplify the trigonometric expression shown in the trig problem
Simplify this fourth degree trigonometric expression involving functions of 15 degrees
Find the cosine of the given angle, based on information provided on three component angles

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