Question 964586
Solve: &#8730;(2) sin D cos D = sin D, where D (-180 degrees, 180 degrees)
use x for D
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&#8730;(2)sinxcosx=sinx
&#8730;2cosx=1
cosx=1/&#8730;2=&#8730;2/2
x=-45&#730;, 45&#730;