Solve the trigonometric:

by

(i) \frac { 1 }{ 1+cosA } +\frac { 1 }{ 1-cosA } =2{ cosec }^{ 2 }A
(ii) \frac { 1 }{ secA+tanA } +\frac { 1 }{ secA-tanA } =2{ sec }A

Solution:

(i) \frac { 1 }{ 1+cosA } +\frac { 1 }{ 1-cosA } =2{ cosec }^{ 2 }A
L.H.S = \frac { 1 }{ 1+cosA } +\frac { 1 }{ 1-cosA }

ML Aggarwal Class 10 Solutions for ICSE Maths Chapter 18 Trigonometric Identities Ex 18 Q14.1

ML Aggarwal Class 10 Solutions for ICSE Maths Chapter 18 Trigonometric Identities Ex 18 Q14.2

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