Mathematics
kicki89
2016-04-10 02:37:36
The expression sin 50 cos 40 + cos 50 sin 40 is equivalent to
ANSWERS
valeria897
2016-04-10 06:22:47

sin (a+b) = sin a. cos b + cos a. sin b a= 50° and b=40°, then sin(50+40) = sin 50° . cos 40° + cos 50° . sin 40° sin(50+40) = sin 90° = 1 and sin 50° . cos 40° + cos 50° . sin 40° = 1

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