EDWIN OGIE LIBRARY

SS1 Chemistry First Term - Introduction to Chemistry | Edwin Ogie Library SS1 Chemistry First Term: Introduction to Chemistry This opening topic introduces chemistry as a science, explains the laboratory, safe practices, apparatus, and the value of chemistry in everyday life. The page also includes a 40-question CBT quiz with a 15-minute timer and one-question-at-a-time navigation. Home / Library Collections / SS1 Chemistry / Introduction to Chemistry Topic 1 Introduction to Chemistry Chemistry is the branch of science that studies matter, its composition, properties, changes, and the energy involved in those changes. It helps us understand the substances around us and how they interact. Chemistry is present in food, medicine, agriculture, industry, environment, and everyday household products. What students should learn Meaning of chemistry ...

Algebra Problem Bank — Edwin Ogie Library Algebra Problem Bank — Progressive Difficulty (JAMB Focus) Step-by-step solutions and worked examples (3 per topic). Includes a 40-question timed CBT for 15 minutes and a donation section. Edwin Ogie Library Algebra Cheat‑Sheet: Key Formulas & Tricks Essentials (a+b)^2 = a^2 + 2ab + b^2 (a−b)^2 = a^2 − 2ab + b^2 (a+b)(a−b)=a^2−b^2 Quadratic formula: x = [−b ± √(b²−4ac)]/(2a) Sum of roots: α+β = −b/a , Product: αβ = c/a Arithmetic sequence: a_n = a_1 + (n−1)d Sum of first n integers: n(n+1)/2 Speed Tricks Test simple values (0,1,−1) to eliminate impossible MCQ options. Use factor test: If p is root then (x−p) divides polynomial. ...

Trigonometry Tricks for Exams — Edwin Ogie Library Trigonometry Tricks for Exams — Cheat-sheet & Practice Quick identities, angle facts, speed tips, worked examples, exercises and a 40‑question JAMB‑style CBT (15 mins) Edwin Ogie Library Cheat-sheet: Core Identities & Special Angles Basic definitions For a right triangle: sinθ = opp/hyp , cosθ = adj/hyp , tanθ = opp/adj . Also tanθ = sinθ/cosθ . Pythagorean identities sin²θ + cos²θ = 1 1 + tan²θ = sec²θ 1 + cot²θ = csc²θ Angle sum & difference sin(α±β) = sinα cosβ ± cosα sinβ cos(α±β) = cosα cosβ ∓ sinα sinβ tan(α±β) = (tanα ± tanβ)/(1 ∓ tanα tanβ) Double & half angles sin2θ = 2sinθ cosθ cos2θ = cos²θ − sin²θ = 2cos²θ − 1 = 1 − 2sin²θ tan(θ/2) = ±√((1−cosθ...

Edwin Ogie Library Simple Machines — Definition, Types, MA, VR & Efficiency Introduction to Simple Machines Simple machines are the most basic mechanical devices that change the direction or magnitude of a force. They form the foundation of complex machinery and make work easier by trading force for distance (or vice versa). This lesson covers definitions, the 6 classical types, mechanical advantage (MA), velocity ratio (VR) and efficiency, with worked examples and a CBT quiz. Types of Simple Machines Lever — rigid bar rotating about a fulcrum. Pulley — wheel and rope to change direction and mechanical advantage. Inclined Plane — raise loads using less force over a longer distance. Wedge — converts force to lateral forces to split objects. Screw — inclined plane around a cylinder converting rotation to linea...