∫f(x)dx cos A = b²+c²-a² / 2bc ax²+bx+c=0 ∑(n=1)∞ π r² sin²θ + cos²θ = 1
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Each volume focuses on a core math topic with 50 carefully selected problems — from foundational to challenging — all with complete step-by-step solutions.

Geometry 1 Book Cover Book 1

Geometry

50 Math Problems With Solution — Geometry 1

Angles, triangles, circles, and area problems — build your geometric intuition from the ground up with clear, step-by-step solutions.

Geometry 2 Book Cover Book 2

Geometry

50 Math Problems With Solution — Geometry 2

Sharpen your geometry skills with 50 challenging problems and full step-by-step solutions.

Algebra 1 Book Cover Book 3

Algebra

50 Math Problems With Solutions — Algebra 1

Equations, polynomials and systems — challenging algebra with worked examples that take you from setup to solution, every step of the way.

Trigonometry Book Cover Book 4

Trigonometry

50 Challenging Math Problems With Solutions — Trigonometry

Sine, cosine, tangent, identities and other applications — trig demystified with 50 full solutions.

Integral Calculus Book Cover Book 5

Integral Calculus

50 Challenging Calculus Problems With Solutions — Indefinite Integrals

Indefinite integrals, substitution, and integration techniques — calculus made approachable with every step shown.

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