Cot 130 Degrees

Sin, Cos, Tan, Cot of an Angle
Function
Angle (°)

What is cot 130°?

Answer

cot 130° ≈
−0.8391

Angle in radians: 130° = 13π/18. The point of the angle is in quadrant II, where cotangent is negative.

≈ — rounded to 4 decimal places. cot 130° can't be written with square roots: 130° is not a multiple of 3°.

cot 130° = cot(180° − 50°) = −cot 50° ≈ −0.8391

cot 130° = cos 130° / sin 130° ≈ −0.8391

xyOP

P(cos 130°, sin 130°) ≈ (−0.6428, 0.7660)

C(cot 130°, 1) ≈ (−0.8391, 1) — where line OP meets the line y = 1.

All four functions of 130°
FunctionExact valueDecimal
sin 130°—≈ 0.7660
cos 130°—≈ −0.6428
tan 130°—≈ −1.1918
cot 130°—≈ −0.8391

Reference angle: cot 50° ≈ 0.8391

See Also

Recalculate with different values ↑

Cotangent of nearby angles

Anglecot
125°≈ −0.7002
126°−√(5 − 2√5)
127°≈ −0.7536
130°≈ −0.8391
134°≈ −0.9657
135°−1
140°≈ −1.1918

FAQ

What is cot 130°?

cot 130° ≈ −0.8391

Why does cot 130° have no exact value?

A trigonometric value of a whole number of degrees can be written with square roots only when the angle is a multiple of 3°. 130° is not, so no such exact form exists; the value is used as a decimal: cot 130° ≈ −0.8391.

Why does a calculator show 0.3949 for cot 130?

The calculator is in radian mode (RAD): it takes cot 130 as the cotangent of 130 radians, cot 130 rad ≈ 0.3949. Switch it to degrees (DEG): cot 130° ≈ −0.8391. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.

See Also