yungnoaweo4209
06.03.2020 •
Mathematics
Sinxcos y = 1 (sin(x + y) + sin(x-y))
sin x COSY -
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Ответ:
Step-by-step explanation:
sin (x+y)=sin x cos y+cos x sin y
sin (x-y)=sin x cos y-cos x sin y
add
sin (x+y)+sin (x-y)=2 sin x cos y
sin x cos y=1/2 [sin (x+y)+sin (x-y) ]
Ответ:
and get x+3×2x-1
then add like terms
and get
3x+2.
that's your answer.
3x+2