CHAPTER 4. TRIGONOMETRY

4.20 Trigonometric Equations

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tÜçäÉ=åìãÄÉêW=å=

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504. ëáåñ=~I=ñ=()−Nå~êÅëáå~+πå=

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505. 
     

     Åçëñ=~I=ñ=±~êÅÅçë~+Oπå=

     
     


506. 
     

     í~åñ=~I=ñ=~êÅí~å~+πå=

     
     


507. Åçíñ=~I=ñ=~êÅÅçí~+πå=

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4.21 Relations to Hyperbolic Functions

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fã~Öáå~êó=ìåáíW=á=

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508. ëáå()áñ =áëáåÜñ=

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509. í~å()áñ =áí~åÜñ=

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510. Åçí()áñ =−áÅçíÜñ=

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511. ëÉÅ()áñ =ëÉÅÜñ=

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512. ÅëÅ()áñ =−áÅëÅÜñ=

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