Question

Daca sin x = -0,7 afla sin(x+π)

Answer 1

$\sin \text{x} = -0,7\\ \\ \sin(\text{x}+\pi) = -\sin \text{x} \\ \\ \sin (\text{x}+\pi) = -(-0,7) \\ \\\Rightarrow \boxed{ \sin (\text{x}+\pi) = 0,7}$