Question
If 5sinĪø +12 cosĪø = 13, then find the value of 12cosĪø
ā 5 sinĪø.Solution
5sinĪø +12 cosĪø = 13Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā ā¦ Divide by 13 in both sides. ā (12/13) sinĪø + (5/13) cosĪø = 1 Comparing with, sin2Īø + cos2Īø = 1, Ā we get sinĪø = 12/13 And cosĪø =5/13 So, now- 12cosĪø ā5 sinĪø. =5Ć12/13 -12Ć5/13 =0.
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