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If 3(siny – cosx) = 4(sinx + cosy), prove that sin3x / cos3y = 1 I did not understand the last two steps. Can you explain?

 
I did not understand the last two steps.
Can you explain?

Grade:12th pass

1 Answers

Nishant Vora IIT Patna
askIITians Faculty 2467 Points
9 years ago
Helllo student,
Please find the answer to your question below
3siny – 3cosx = 4sinx + 4cosy
3siny - 4cosy = 4sinx + 3cosx
cos3y = sin 3x
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