Question

mathematics important formulas class 10 ​

Answer 1

Answer:

Real numbers;

1. HCF (a,b) X LCM (a,b) =a X b

2. Terminating decimal expression can be written in the form p/2n5m

PAIR OF LINEAR EQUATIONS;

1. If a1, a2, a3, a4, a5, a6,… are the terms of AP and d is the common difference between each term, then we can write the sequence as; a, a+d, a+2d, a+3d, a+4d, a+5d,….,nth term… where a is the first term. Now, nth term for arithmetic progression is given as;

                                  nth term = a + (n-1) d

2.Sum of the first n terms in Arithmetic Progression;

                                   Sn = n/2 [2a + (n-1) d]

Trigonometry;

Sin θ  = P/H

Cos θ = B/H

Tan θ = P/B=  S i n θ /C o s θ

Sec θ =  1/ c o s θ

Cot θ =  1/ t a n θ

Cosec θ =  1 /s i n θ

HOPE THIS HELPS U PLZ MARK ME THE BRAINLIEST

Answer 2

Answer:

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