Question

If 90º ≤ A ≤ 180º and sin(A) = 4/7 then determine the exact values of cos(A) and tan(A)

Answer 1

Cos(A)=0.82

Tan(A)=0.696

Explanation:

A=sin^- (4/7)

＝34. 85

Cos (A)

Cos(34.85)=0.82

Tan(A)

Tan(34.85)=0.696