3 Comments

  1. Caawiye Member

    Solution

    a. \(sin 5π/8←cos⁡(π/2+5π/8)=cos (4π-5π)/8=(-π)/8 \)

    b. \(cot 9π/10←Tan⁡(π/2+9π/10)=cos (5π-9π)/10 \)=

    c. \(sec146°(42)^’=csc⁡( 90°-146°(42)^’ \))=

    d. \(Tan174°(03)^’=c⁡ot( 90°-174°(03)^’ \))=

    e. \( Cot 176.9814°=Tan⁡〖 ( 90°-176.9814° \))=

    Solution

    a./(=cos (4π-5π)/8=(-π)/8=22.5 /)

    b. /(=cos (5π-9π)/10=(-4π)/10=72/)

    c. /(sec146° 42^’=csc⁡( 90°-146° 42^’ )=-56.7 /)

    d /(. Tan174° 03^’=c⁡ot( 90°-174° 03^’ )=-84.05. /)

    e. /( Cot 176.9814°= Tan⁡( 90°-176.9 /)

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