a. b=5.7b=5.7b=5.7 b. senA=47sen A=\frac{4}{7}senA=74, cosA=5.77cosA=\frac{5.7}{7}cosA=75.7, tanA=45.7tanA=\frac{4}{5.7}tanA=5.74, cscA=74cscA=\frac{7}{4}cscA=47, secA=75.7secA=\frac{7}{5.7}secA=5.77, cotA=5.74cotA=\frac{5.7}{4}cotA=45.7