John Rhodes, Math Teacher at Senioritis.io

John Rhodes
June 21, 2023
Calculus

Learn How To Find The Value Of Cos 2X Using Double Angle Formulas For Cosine

cos 2x cos^2 x – sin^2 x The expression cos 2x involves the cosine of twice the angle x. To find the value of this expression, we...

John Rhodes
June 21, 2023
Calculus

Learn How To Simplify Trigonometric Expressions With The Formula For Cos^2X In Terms Of Double Angle

cos^2x (Power to Double Angle) 1/2(1+cos2x) To derive the formula for cos^2x in terms of double angle: We know that cos2x = cos(x + x) = cosxcosx...

John Rhodes
June 21, 2023
Calculus

Mastering The Double Angle Formula For Sin^2X: A Comprehensive Guide

sin^2x (Power to Double Angle) 1/2(1-cos2x) Applying the power to double angle formula to sin^2x, we get: sin^2(2x) = (2sinx cosx)^2 sin^2(2x) = 4sin^2x cos^2x Using the...

John Rhodes
June 21, 2023
Calculus

Even Symmetry Of Cosine Function And Deriving Its Result For Cos(-X) = Cos(X)

cos(-x) cosx If we have a real number x, then -x represents the additive inverse of x which means that it is the number that when added...

John Rhodes
June 21, 2023
Calculus

The Absolute Value Function: Definition And Examples.

|x| x if x>=0-x if x

John Rhodes
June 21, 2023
Calculus

The Sum-To-Product Formula For Sin And The Unit Circle Concept

sin(A+B) sinAcosB+cosAsinB The formula for sin(A + B) is: sin(A + B) = sin(A) cos(B) + cos(A) sin(B) This formula is also known as the sum-to-product formula...

John Rhodes
June 21, 2023
Calculus

Unlocking The Angle Subtraction Formula For Sine | Simplify Trigonometry With A-B Calculation

sin(A-B) sinAcosB-cosAsinB Using the angle subtraction formula for sine, we have: sin(A – B) = sin(A)cos(B) – cos(A)sin(B) where sin(A), cos(A), sin(B), and cos(B) are the respective...

John Rhodes
June 21, 2023
Arithmetic

Effortlessly Factor Quadratic Expression: Learn How To Find Two Numbers To Simplify X² + 3X – 40

x²+3x-40 (x+8)(x-5) To factor the quadratic expression x² + 3x – 40, we need to find two numbers that multiply to give -40 and add up to...