## NCERT Solutions for Class 10 Maths – Some Applications of Trigonometry

**1. If sun’s elevation is 45****°. ****Find the length of the shadow of a pole of height 8 m.**

In rt. Δ PQR, ∠B=90° and ∠

**1. If sun’s elevation is 45****°. ****Find the length of the shadow of a pole of height 8 m.**

In rt. Δ PQR, ∠B=90° and ∠

**Exercise 8.1**

Q1) In △ABC , 90∘ at B, AB=24cm, BC = 7cm.

**Determine:**

**(i)sin(A), cos(A)**

**(ii) sin(C), cos(C)**

**Ans.)** In

**1. If the point A (x , y) is equidistant from B (4 , 2) and C (-2 , 4). Find the relation between x and y.**

|AB| = (x−5)

__Exercise 1__

*Question 1: *

*Fill in the blanks *

A: All circles are ________ (Similar, Congruent)

**Solution:** All circles are __similar.__

B: All squares are ________ (Congruent, similar)

**Solution:** All squares are __similar__.

C: All _________ triangles are similar. (Isosceles, equilateral)

**Solution:** All __equilateral__ triangles are similar.

D: Two polygons having the same number of sides are similar, if

(i) Their corresponding angles are […]

**General Form of an A.P: **

Let us consider a series with n number of terms:

a_{1 }+ a_{2 }+ a_{3 }+ a_{4 }+ a_{5 }+ a_{6 }+ a_{7 }…………………………….. _{ }= a_{n}

The above series of numbers is said to form an Arithmetic Progression (A.P) if,

a_{2 }– a_{1 }= a_{3 }– a_{2 }= a_{4 }– a_{3 }= …………………………. […]

**Polynomials** with degree 2 are called quadratic polynomials. When this polynomial is equated to zero, we get a quadratic equation.

Its **general form** is **a ^{2 }+ bx + c = 0**, where

In many real life situations we deal with quadratic equations.

Suppose, we have to make […]

**Exercise1 **

**Question 1:**

*Astitva tells his daughter, “Seven years ago I was seven times as old as you were then and also three years from now, I shall be three times as old as you will be.” Represent this situation algebraically and graphically.*

**Solution:**

Let the present age of Astitva be ‘x’.

And, the present age of his daughter be […]

*DEGREE OF A POLYNOMIAL:-*

**If p(x) is a polynomial in x, the highest power of x in p(x) is called the degree of polynomial p(x).**

And expressions like**:- x2−−√+
**

**QUESTION-1**

Use Euclid’s division algorithm to find the HCF of:

i)135 and 225

ii)196 and 38220

iii)867 and 225

**Solution:**

i) We start with the larger number i.e 225

By Euclid’s division algorithm,we have

225=1×135+90

135=1×90+45

90=2

Keeping in mind the importance of class 10 in a student’s life, we at Robomate+ keep on helping the students in their endeavor to get the quality education they always wanted. Here, we have attached the solutions for NCERT Solutions for Maths chapter wise. The solutions are intended for those students who use NCERT […]

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