Exercise D question 4 -
How on earth would you know to multiply the -2 by COS60 first before you did anything else in that equation?
Should I know these things....??
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Cosine rule watch
- Thread Starter
- 20-01-2016 21:43
- 20-01-2016 23:31
Because that's the rule? a^2 = b^2 + c^2 - 2bc * cosA