Sin²(π/4) + sin²(π/3) = (√2/2)² + (√3/2)²=2/4 + 3/4 = 5/4
cos²(π/6)-cos²(π/4)=(√3/2)² - (√2/2)² = 3/4 - 2/4 = 1/4
tg²(π/4) * sin(π/3) * tg²(π/3) = 1² * (√3/2) * (√3)²=3√3/2
tg(π/6) * cos²(π/6) * sin(π/3) = (√3/3) * (√3/2)² * (√3/2) = 9/24=3/8
5sin(π/2)+4cos0 - 3sin(3π/2)+cosπ=5*1 + 4*1 - 3*(-1) + (-1) = 5+4+3-1=11
sin²(-π) - cos(-3π/2) + 2sin2π - tgπ = 0 - 0 + 2*0 -0 = 0
3-sin²(π/2) + 2cos²(π/2) - 5tg²(π/4) = 3 - (√3/2)² + 2*0 - 5*1²=-2-3/4=-11/4
3sin²(π/2) - 4tg(π/4) - 3cos²(π/6) + 3ctg²(π/2) = 3*1 - 4*1 - 3*(√3/2)² +3*0=-13/4