Why You Need This Cheat Sheet
Mathematics can be overwhelming, especially when preparing for exams like the SAT, ACT, or final university assessments. We created this comprehensive mathematical cheat sheet so you never have to search for a formula again. Bookmark this page, share it with your classmates, or link to it from your school's resource board.
1. Essential Algebra Formulas
- Quadratic Formula: x = [-b √(b² - 4ac)] / 2a
- Slope-Intercept Form: y = mx + b
- Distance Formula: d = √[(x&sub2; - x&sub1;)² + (y&sub2; - y&sub1;)²]
- Midpoint Formula: M = [(x&sub1; + x&sub2;)/2, (y&sub1; + y&sub2;)/2]
2. Core Trigonometry Identities
- Pythagorean Identity: sin²(θ) + cos²(θ) = 1
- Tangent Identity: tan(θ) = sin(θ) / cos(θ)
- Double Angle (Sine): sin(2θ) = 2sin(θ)cos(θ)
3. Geometry & Area
- Area of a Circle: A = πr²
- Circumference of a Circle: C = 2πr
- Area of a Triangle: A = ½bh
- Volume of a Sphere: V = &frac43;πr³
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