tg^2 π/4 + 2sin π/12 * cos π/12 - ctg^2 π/4
tg^2 π/4 = 1 (because tg π/4 = 1)2sin π/12 * cos π/12 = sin(2π/12) = sin(π/6) = 1/2ctg^2 π/4 = 1
Therefore, the expression simplifies to:
1 + 1/2 - 1 = 1/2.
tg^2 π/4 + 2sin π/12 * cos π/12 - ctg^2 π/4
tg^2 π/4 = 1 (because tg π/4 = 1)
2sin π/12 * cos π/12 = sin(2π/12) = sin(π/6) = 1/2
ctg^2 π/4 = 1
Therefore, the expression simplifies to:
1 + 1/2 - 1 = 1/2.