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A = 180 - ×
Sen (A) = Sen (180-×) = Sen× = 4/5
Arcsen4/5 = x
x = 53°
A = 180-53 = 127
Cos(127) = cos(180-53) = -cos53 = -0.6
Tan(127) = sen(A)/Cos(A) = -4/3 = - 1.33
Ctg(127) = -3/4 = -0.75
Sec (127) = 1/-cos53 = -1.66
Csc(127) = 5/4 = 1.25