If the minimum value of ∣sinx+cosx+tanx+cotx+secx+cosecx∣,x∈R is m+n then m + n equal (m,n∈z)
Playing a little bit with the expression one discovers that if
we get t=sinx+cosx,t2−12=sinx cosx,then given expression =t+1t2−12+tt2−12
=t+2t2−1+2tt2−1y=t+2t−1=t−1+2t−1+1
If 1<t≤2 then y=t−1+2t−1+1≥22+1
If −2≤t<−1 then y=−1+1−t+21−t≥22−1
∴ymin=22−1=8−1∴m+n=7