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deepaksoni
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Asked: 2021-03-15T22:11:50+05:30 In:

(i) (1 + sin A)/ cos A + cos A/ (1 + sin A) = 2 sec A (ii) tan A/ (sec A – 1) + tan A/ (sec A + 1) = 2cosec A

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This is an important question taken from the Book Book- ML Aggarwal
Board- ICSE
Publication- Avichal
Chapter- Trigonometric Identities
Chapter number-18

This ques has been asked in previous year question paper of class 10 we

 have prove. That

(i) (1 + sin A)/ cos A + cos A/ (1 + sin A) = 2 sec A (ii) tan A/ (sec A – 1) + tan A/ (sec A + 1) = 2cosec A

Class 10, chapter 18, ICSE, ques no 17

class10ml aggarwaltrigonometric identities
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    1 Answer

    1. Guru

      Solution:

      (i) L.H.S. = (1 + sin A)/ cos A + cos A/ (1 + sin A)

      ML Aggarwal Solutions for Class 10 Chapter 18 - 18

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