Sin(40 + A) Cos(10+A) - Cos(40+A) Sin(10+A) = 1/2
Answers
Answered by
2
sin(X+Y) = sinX*cosY - cosX*sinY
if X = 40+A
Y = 10+A
therefore,
Sin(40 + A) Cos(10+A) - Cos(40+A) Sin(10+A) = Sin(40 + A + 10 + A)
=Sin(60 +A)
if A=0
=Sin(60 + 0)=Sin(60)=1/2
if X = 40+A
Y = 10+A
therefore,
Sin(40 + A) Cos(10+A) - Cos(40+A) Sin(10+A) = Sin(40 + A + 10 + A)
=Sin(60 +A)
if A=0
=Sin(60 + 0)=Sin(60)=1/2
Similar questions