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melamori03 [73]
3 years ago
11

HELP FAST PLEASE!!! Show that sin(x+pi)=-sinx

Mathematics
2 answers:
kondaur [170]3 years ago
7 0
Sin(a + b) = sin(a)cos(b) + sin(b)cos(a)
sin(x + pi) = sin(x)cos(pi) + cos(x)sin(pi)

sin(pi) = 0cos(pi) = -1

sin(x + pi) = sin(x)(-1) + cos(x)(0)
sin(x + pi) = -sin(x) + 0
I am Lyosha [343]3 years ago
6 0
Is it possible with only letters
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