Question

sendo x= 30 graus calcule o valor da expressao y= 2× seno dex-4×cosseno de x+tangente2x ÷cosseno4x menos seno de 2x

Answer 1

numerador:2 sen x-4 cos x+tg 2x2. sen30 - 4.cos30 + tg(2.30)2.1/2 - 4.√3/2 + tg 601 - 2√3 + √31-√3 >
denominador:cos 4x-sen 2xcos 4.30 - sen 2.30cos 120 - sen 60-1/2 - √3/2-(1+√3)/2 >
y=2 sen x-4 cos x+tg 2x/cos 4x-sen 2xy = (1-√3) / -(1+√3)/2y = (1-√3) . -2/(1+√3)y = -2. (1-√3) / (1+√3).... *(1-√3)/(1-√3)y= -2.(1-√3)² / (1-3)y= -2.(1-√3)² / -2y = (1-√3)²y= 1+3 -2√3y= 4-2√3y= 2(2-√3)