It may be necessary to use Pythagoras' theorem and trigonometry to solve a problem. ABCDEFGH is a cuboid. Length AB is 6 cm, length BG is 3 cm and length FG is 2 cm ...
Being able to identify which formula to use, sine or cosine, and when, is necessary to answer questions on this topic successfully. Check you are confident in how to use the sine and cosine rules.
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