Verified Answer :

caylus

Hello,
We suppose x ≠+/-π/2. (division by 0)


sec x=1/cos x

1-sec x= 1-1cos x=(cos x -1)/cos x

(1-sec x)/(1-cos x)=(cos x -1)/(cos x(1-cos x))=-1/cos x=- sec x

taskmasters

To answer, we have to simplify the expression given. We know that:

sec x=1/cos x

1-sec x= 1-1/cos x=(cos x -1)/cos x

(1-sec x)/(1-cos x)=(cos x -1)/(cos x*(1-cos x))=-1/cos x=- sec x


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