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In the video where you explained the formula of sin(x+y)the angle CBA is not equal to x. It is commoning y can you explain the angle of CBA

Asked by 20th July 2012, 9:07 PM
Answered by Expert
Answer:
 
Since BE is perpendicular to OD, so angle BEO is 90 degrees.
So, in triangle POE, angle OPE = 90 - x (using angle sum property)
 
So, angle CPA is also 90 - x (vertically opposite angles)
 
In right triangle APB, by angle sum property, we get,
angle ABP = x
That is, angle CBA = x
Answered by Expert 24th July 2012, 4:59 PM
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