# Functions

Pro Problems > Math > Algebra > Functions# Featured Pro Problems

A problem involving the number of words in seven books on a shelf - arithmetic sequences

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

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Finding F, Function Equation# Featured Games on This Site

Match color, font, and letter in this strategy game

Mastermind variation, with words

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