Difference of 2 nonconsecutive triangular numbers

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trig Write each expression as an equivalent algebraic expression involving only x.

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CBSE 2000 Hindustan: integral (1+tan(x))/(x+log(sec(x)) dx

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A bag contains 20 identical red marbles, 20 identical green marbles, & 20 identical blue marbles.

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Roorkee 1976 RET 1991Hindustan: trig integral 1/(sin^2(x) cos^2(x)) dx

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STPM Math T Sem2: Find the Maclaurin series for xe^(-x) [ahp kia]

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2 ways: trig integral ∫tan(x)/sec^5(x) dx

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1st way: trig derivative (sin(x))^x

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3 ways: derivative a^(f(x)g(x))

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Is 4cos^3(x)-3cos(x) EVEN, ODD, NEITHER, BOTH EVEN & ODD?

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log derivative ln(x) via chain rule

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exp derivative e^f(g(x)) h(x)

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