3tg p/4+2sin3p/4-cos (p/2+30°)

Question

3tg p/4+2sin3p/4-cos (p/2+30°)

Answer 1

Решение
3tg p/4+2sin3p/4-cos (p/2+30°) = 3*1 + 2*sin(π - π/4) + sin30° =
= 3 + 2sin(π/4) + 1/2 = 3,5 + 2*(√2/2) = 3,5 + √2