Trigonometry Examples

$- 1.4 π$

Step 1

Find an angle that is positive, less than $2 π$ , and coterminal with $- 1.4 π$ .

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Step 1.1

Add $2 π$ to $- 1.4 π$ .

$- 1.4 π + 2 π$

Step 1.2

The resulting angle of $1.88495559$ is positive and coterminal with $- 1.4 π$ .

$1.88495559$

Step 2

Since the angle $1.88495559$ is in the second quadrant, subtract $1.88495559$ from $π$ .

$π - 1.88495559$

Step 3

Simplify the result.

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Step 3.1

Replace with decimal approximation.

$3.14159265 - 1.88495559$

Step 3.2

Subtract $1.88495559$ from $3.14159265$ .

$1.25663706$