If you focus on just memorizing the formula, chances are you won't be able to remember it for very long. Addition, subtraction, multiplication and division are easy, what if you come across derivation, calculus and geometry? The basic Maths formulas include arithmetic operations, where we learn to add, subtract, multiply and divide. So let's say you know that speed is the amount of time it takes an object to travel a certain distance. 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The Math Formula Chart has all the basic math formulas, below: Additional guidelines based on all Math formulas are given on our site. This page contains all the formulas needed for the Extra class ham radio license exam. $$ gain\text-of\text-antenna\text-in\text-dBd = gain\text-of\text-antenna\text-in\text-dBi - 2.15~ \text{dB} $$, $$ ERP = transmitter \text{-}power \times 10^\left(\frac{gain~in~dB}{10}\right) $$, $$ \lambda = \frac{c~ \times~ velocity \text{-}\!factor}{f} $$, $$ power\text-to\text-load = forward\text-power - reflected\text-power $$, $$ f_{img1} = f_{RF} - 2 \times f_{IF} $$, $$ f_{img2} = f_{RF} + 2 \times f_{IF} $$, $$ BNF = NF + 10 \times \text{log}(BW) $$, $$ BNF $$ is the bandwidth noise floor (the noise for the entire received bandwidth) (in dBm), $$ NF $$ is the 1-Hz noise floor (in dBm/Hz), $$ BW $$ is the receive filter bandwidth (in Hz). CBSE Class 8 Maths Formulas Book: National Council of Educational Research and Training (NCERT) Class: 8th Class Subject: Maths. Download the important maths formulas and equations to solve the problems easily and score more marks in your Class 8 CBSE Exams.Vedantu is a … We present you a host of formulas (more than 400) for your reference to solve all important mathematical operations and questions. Also, check with Maths Syllabus here for all classes. But if you understand each part of the formula and how they work together, it can be easier to remember them. Formulas on the Extra Exam. Free Extra course for active volunteer examiners. Also, each formula here is given with solved examples. Some of the formulas are: The fundamental concepts we learn for maths formulas are: The important formulas are related to algebra, Pythagoras theorem, series and sequence, mensuration, calculus, probability and statistics, trigonometry, matrices, etc. Time constant (all components in parallel): $$ maximum \text{-} error = measurement \times accuracy $$, $$ hal\!f \text{-} power \text{-} bandwidth = \frac {f_R}{Q} $$, $$ N = 100 \times \sqrt{\frac{L}{A_L}} $$, AL in $$ \mu\text{H} / 100 \text{ turns} $$, $$ N = 1000 \times \sqrt{\frac{L}{A_L}} $$, AL in $$ \text{mH} / 1000 \text{ turns} $$, $$ deviation \text{-}ratio = \frac{D_{MAX}}{M_{MAX}} $$, $$ modulation \text{-}index = \frac{frequency\text-deviation}{modulating\text-frequency} $$, $$ \theta = \text {arctan} \left(\frac {X}{R}\right) $$, $$ power \text{-}\!factor = \text{cos} \left(\theta \right) $$, $$ apparent \text{-}power = V_{RMS} \times I $$, $$ true \text{-}power = apparent \text{-}power \times power \text{-}\!factor $$.

2020 extra class math formulas