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NCERT Solutions for Class 10 Mathematics hindi medium chapter 8. त्रिकोणमिति का परिचय is strongly required by cbse students now a days for preparing the board exams. These all materials are fully explained in easy and in importatant points that help the students during reviewing the chapters before cbse board exams. There are so many HOT questions for NCERT Solutions for Class 10th Mathematics hindi medium that score high than usual. At this page we maintain four important sections like chapter review, ncert books exercise solutions, questions under chapter solutions, Examination based additional important questions with solutions for NCERT Books Mathematics.
अध्याय 8. त्रिकोणमिति का परिचय
NCERT SOLUTION
अभ्यास 8.4
Q4. सही विकल्प चुनिए और अपने विकल्प की पुष्टि कीजिए:
(i) 9 sec2 A – 9 tan2 A बराबर है:
(A) 1 (B) 9 (C) 8 (D) 0
Correct Answer: (B) 9
Solution:
9 sec2 A – 9 tan2 A = 9(sec2 A – tan2 A)
= 9 × 1 = 9
(ii) (sec A + tan A) (1 – sin A) बराबर हैं :
(A) sec A (B) sin A (C) cosec A (D) cosA
Correct Answer: (D) cosA
Q5. निम्नलिखित सर्वसमिका सिद्ध कीजिए, जहाँ वे कोण, जिनके लिए व्यंजक परिभाषित है, न्यूनकोण है :
अत: LHS = RHS proved
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