Which is the principal value of tan '(-1.4)?

305.54degrees

Step-by-step explanation:

WE are to find the principal value of tan^-1(-1.4). Principal value means the highest value  

theta = tan ^-1(-1.4)

theta = -54.46

Since theta is negative in the fourth quadrant;

theta = 360 - 54.46

theta = 305.54degrees

Hence the principal value is 305.54degrees

step-by-step explanation:

first, eliminate the parenthesis:

3

x

+

2

−

4

x

second, group like terms:

3

x

−

4

x

+

2

third, combine like terms:

(

3

−

4

)

x

+

2

→

−

1

x

+

2

→

−

x

+

2