Practicing Success
The value of tan-1 (√3) - sec-1(-2) is equal to- |
-π/3 π/3 -2π/3 2π/3 |
-π/3 |
Let tan-1 (√3) = x. Then, tan x =√3 = tan (π/3) We know that the range of principal value branch of tan-1 is (-π/2 , π/2) so tan-1 (√3) = (π/3) Let, sec-1(-2) = y. Then secy = 2 = -sec(π/3) = sec(π- π/3) = sec(2π/3) We know that the range of principal value branch of sec-1 is [0, π]- {π/2} so sec-1(-2) = 2π/3 Hence, tan-1 (√3) - sec-1(-2) = (π/3)- (2π/3) = -π/3 |