1003076712 | math4u.vsb.cz

Subtema:

Seno, coseno, tangente, cotangente

Parte:

Project ID:

1003076712

Accepted:

1

Clonable:

0

Easy:

1

Sea

\sin x = a

y

\cos x = b

. Entonces

\cos (2 x)

equivale a:

b^{2} - a^{2}

2 b

2 a b

a^{2} - b^{2}