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प्रश्न
Show that:
(i)` (1-sin 60^0)/(cos 60^0)=(tan60^0-1)/(tan60^0+1)`
उत्तर
LHS=`(1-sin 60^0)/(cos 60^0) =(1-(sqrt(3))/2)/(1/2) = (((2-sqrt(3))/2))/(1/2) =((2-sqrt(3))/2) xx2=2-sqrt(3)`
RHS=`(tan60^0-1)/(tan60^0+1) = (sqrt(3)-1)/(sqrt(3)+1) = (sqrt(3)-1)/(sqrt(3)+1) xx(sqrt(3)-1)/(sqrt(3)+1)=((sqrt(3)-1)^2)/((sqrt(3))^2-1^2)=(3+1-2sqrt(3))/(3-1) =(4-2sqrt(3) )/2 = 2-sqrt(3)`
Hence, LHS = RHS
`∴ (1-sin 60^0)/(cos 60^0)=(tan 60^0-1)/(tan60^0+1)`
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