• Algebra
• Trigonometry
• Geometry
• Calculus

Signs of trigonometric functions in first quadrant

Sin function

The sign of value of sine function in first quadrant is positive.

$\sin{\theta} > 0$

Cos function

The sign of value of cosine function in first quadrant is positive.

$\cos{\theta} > 0$

Tan function

The sign of value of tangent function in first quadrant is positive.

$\tan{\theta} > 0$

Cot function

The sign of value of cotangent function in first quadrant is positive.

$\cot{\theta} > 0$

Sec function

The sign of value of secant function in first quadrant is positive.

$\sec{\theta} > 0$

Csc (or) Cosec function

The sign of value of cosecant function in first quadrant is positive.

$\csc{\theta} > 0$