3 Answers
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. \(Tan174°(03)^'=cot( 90°-174°(03)^' \))=
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^'=cot( 90°-174° 03^' )=-84.05. /)
e. /( Cot 176.9814°= Tan( 90°-176.9 /)
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