Show that: sin(40°+x) cos(10°+x)-cos(40°+x)×sin(10°+x)=one by two
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{sin(x+y)=sinx cosy - cosx siny
sin(40+x-(10+x))
sin(40-10-x-x)
sin(30)
=>1/2
sin(40+x-(10+x))
sin(40-10-x-x)
sin(30)
=>1/2
Answered by
1
Answer:
Explanation:
sin(x+y)=sinx cosy - cosx siny
sin(40+x-(10+x))
sin(40-10-x-x)
sin(30)
=>1/2
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