MathDB
Trigonometry Relations of a Triangle

Source:

January 11, 2009
trigonometry

Problem Statement

In triangle ABC ABC, 3\sin A \plus{} 4\cos B \equal{} 6 and 4\sin B \plus{} 3\cos A \equal{} 1. Then ∠C \angle C in degrees is <spanclass=′latex−bold′>(A)</span> 30<spanclass=′latex−bold′>(B)</span> 60<spanclass=′latex−bold′>(C)</span> 90<spanclass=′latex−bold′>(D)</span> 120<spanclass=′latex−bold′>(E)</span> 150 <span class='latex-bold'>(A)</span>\ 30\qquad <span class='latex-bold'>(B)</span>\ 60\qquad <span class='latex-bold'>(C)</span>\ 90\qquad <span class='latex-bold'>(D)</span>\ 120\qquad <span class='latex-bold'>(E)</span>\ 150
Back to ProblemsView on AoPS