10th math btc

10th math btc

NCERT Solutions for class 10 Math solved by subject matter experts. NCERT CBSE latest book edition solutions. Free downloadable chapter wise NCERT. CBSE NCERT Maths Solutions for Class 10 are very important and time-saving. From NCERT Class 10th Mathematics Solutions, you will also get to know many. Mathematics Assignments for class 9th. Mathematics Assignments for class 10th. Mathematics Assignments for class 11th. Mathematics Assignments for class.

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NCERT Books Solutions for Class 10 Mathematics hindi Medium 8. त्रिकोणमिति का परिचय

प्रश्नावली 8.1 (गणित) 


Q1.  DABC में, जिसका कोण B समकोण है, AB = 24 cm और BC = 7 cm है | निम्न लिखित का मान ज्ञात कीजिए :

(i) sinA, cosA

(ii) sinC, cos C

Solution:

समकोण त्रिभुज DABC में,

AB = 24 cm, BC = 7 cm

पाइथागोरस प्रमेय से,

AC2 = AB2 + BC2

       = 242 + 72

       = 576 + 49

       = 625

AC = √625 = 25 cm

अब तत्रिकोणमितिय अनुपात लेने पर

(i) sin A, cos A

Q2.  आकृति 8.13 में, tan P – cot R का मान ज्ञात कीजिए |   

Solution:

PQ = 12 cm, PR = 13 cm

QR = ?

समकोण त्रिभुज DPQR  में,

PQ = 12 cm, PR = 13 cm

पाइथागोरस प्रमेय से,

PR2 = PQ2 + QR2

132 = 122 + QR2

 169 = 144 + QR2

169 - 144 = QR2

QR2 = 25

QR = √25 = 5 cm

अब तत्रिकोणमितिय अनुपात लेने पर 

 

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