Solution of a triangle
Concept 9 of 15 in Trigonometric Functions
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In △ABC\triangle ABC△ABC, AB=5AB = 5AB=5 with cosB=35\cos B = \frac{3}{5}cosB=53, and AC=42AC = 4\sqrt{2}AC=42 with C=45∘C = 45^\circC=45∘. Can you find BCBCBC without the cosine rule?
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