Question

find angle C when AB and CB are given

Answer 1

tan A = perpendicular/base so tan A = 20/ 20root 3. 20 will be cancelled an tanA=1/root 3. this is the value of 60so A=60

Answer 2

tan C = 20/20root3
=> tan C = 1/root3
=> tan C = tan 30
=> C = 30
as the value of tan 30 is 1/root3

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