0

Guest

Courses New

( cos A–sin A+1)/( cos A +sin A–1) = cosec A + cot A, prove the following

 ( cos A–sin A+1)/( cos A +sin A–1) = cosec A + cot A,
 
prove the following

Grade:12

1 Answers

Vikas TU
14149 Points
3 years ago
Dear student 
cosA-sinA+1/cosA+sinA-1
=(cosA-sinA+1)(cosA+sinA+1)/(cosA+sinA-1)(cosA+sinA+1)
=(cos²A-cosAsinA+cosA+cosAsinA-sin²A+sinA+cosA-sinA+1)/{(cosA+sinA)²-(1)²}
=(cos²A-sin²A+2cosA+1)/(cos²A+2cosAsinA+sin²A-1)
={cos²A+2cosA+(1-sin²A)}/(1+2cosAsinA-1) [∵, sin²A+cos²A=1]
=(cos²A+2cosA+cos²A)/2cosAsinA
=(2cos²A+2cosA)/2cosAsinA
=2cosA(cosA+1)/2cosAsinA
=(cosA+1)/sinA
=cosA/sinA+1/sinA
=cotA+cosecA
=cosecA+cotA (Proved)

Think You Can Provide A Better Answer ?

Other Related Questions on Trigonometry

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More