Trigonometry (Sine/Cosine Rule)

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Sir is it okay to use the layers you have been given in the question instead of the ones on the formula cause I have seen some trigonometry questions they don't use the letters that are on the formula they use letters like K, M, N or any other letter

janetposo
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How Can I Determine The Rule To Use Either Cosine Or Sine

kalengorichard-kshy
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Thanks❤u sir your teachings are clear and simplified already live long sir, I'll pass my GCE Inot year

jinzxuf