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Date Posted: 5 years ago
Views: 315
Knowing what cos a and sin b is, you can basically infer what sin a and cos b are by drawing a right angle triangle, and using the fact that the sine of an angle is Opposite/Hypothenuse and the cosine of an angle is Adjacent/Hypothuse...this concept will be demonstrated in my answer, hope that it helps :)
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The concept can be applied onto the other parts of the question, with the usage of the proper addition or double angle formulae if required
Date Posted:
5 years ago
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