Question #75d62
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"How can I construct vector diagrams?"
1 Answer
Oct 12, 2015
Take RHS and apply trignometric rules
Explanation:
We know that
#sin(A+B) = sinA * cosB + cosA * sinB#
Write
#sin (2theta) = Sin (theta+theta)#
#= sin(theta) * cos(theta) + cos(theta) * sin(theta)#
#=2sin(theta) * cos(theta)#
Rearrange equation
#sin(2theta) = 2sin(theta)cos(theta)#
#sin(theta)cos(theta) =1/2 * sin (2theta)#
