Given:
logcosx(cotx)+4logsinx(tanx)=1,x∈(0,2π)
⇒lncosxlncosx−lnsinx+4(lnsinxlnsinx−lncosx)=1
⇒1−(lncosxlnsinx)+4(1−lnsinxlncosx)=1
⇒(lncosxlnsinx)+4(lnsinxlncosx)−4=0
⇒(lnsinx)2−4(lnsinx)(lncosx)+4(lncosx)2=0
⇒(lnsinx−2lncosx)2=0
⇒lnsinx=2lncosx
⇒lnsinx=lncos2x
⇒cos2x=sinx
⇒1−sin2x=sinx
⇒sin2x+sinx−1=0
⇒sinx=2−1+5
So, α=−1,β=5
∴α+β=4
If the solution of the equation log_ cosx( cotx)+4 log_ sinx( tanx)=1,x∈ (0, π 2) is sin^-1( α +√β 2), where α ,β are integers, then α +β is equal to:
JEE Main 2023 — Mathematics Algebra
If the solution of the equation logcosx(cotx)+4logsinx(tanx)=1,x∈(0,2π) is sin−1(2α+β), where α,β are integers, then α+β is equal to:
Held on 30 Jan 2023 · Verified 1 Jul 2026.
Options
- A
3
- B
5
- C
6
- D
4
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