Home/ Questions/Q 1607
Next
Answered
Jay Singh
  • 2
Asked: 2020-10-30T03:34:03+00:00 In:

Given 15 cot A = 8, find sin A and sec A.

  • 2

NCERT Solutions for Class 10 Maths Chapter 8
Important NCERT Questions
Introduction Trigonometry
NCERT Books for Session 2022-2023
CBSE Board and UP Board Others state Board
EXERCISE 8.1
Page No:181
Questions No:4

2020-2021cbsechapter 8class10introduction trigonometrymathematicsncert
Share

    2 Answers

    1. Best Answer
      Given 15 cot A = 8, find sin A and sec A.

      Given that: 15 cot A = 8
      ⇒ cot A = 8/15
      Let cot A = 8k/15k, where k is a real number.
      In ∆ ABC, by Pythagoras theorem, we have
      AC² = AB² + BC²
      = (8k)²+(15k)²
      = 64k²+225k²
      = 289k²
      ⇒ AC = √(289k²) = 17k
      Hence, sin A = BC/AC = 15k/17k = 15/17 and sec A = AC/AB = 17k/8k = 17/8

      See here for video explanation of this question👇😊

      • 1

    2. Get Hindi Medium and English Medium NCERT Solution for Class 10 Maths to download.
      Please follow the link to visit website for first and second term exams solutions.
      https://www.tiwariacademy.com/ncert-solutions/class-10/maths/chapter-8/

      • 1
    Leave an answer

    Leave an answer

    Browse