Question

SinП/2+cosП-cos^2П/4

Answer 1

Sin(π /2)+cos(π) -(cos(π /4))²=1-1-(0,5*√2)²=-0,25*2=-0,5.

Ответ: -0,5.

Answer 2

I'm assuming you mean "sin(П/2) + cos(П) - cos^2(П)/4".

We can start by simplifying each term individually and then combining them:

• sin(П/2) = 1
• cos(П) = -1 (cosine is negative in the second quadrant)
• cos^2(П) = (-cos(П))^2 = 1 (since cos(П) = -1)

Substituting these values into the expression, we get:

1 - 1 - 1/4 = -5/4

Therefore, the simplified expression is -5/4.