Cot 142 Degrees

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

What is cot 142°?

Answer

cot 142° ≈
−1.2799

Angle in radians: 142° = 71π/90. The point of the angle is in quadrant II, where cotangent is negative.

≈ — rounded to 4 decimal places. cot 142° can't be written with square roots: 142° is not a multiple of 3°.

cot 142° = cot(180° − 38°) = −cot 38° ≈ −1.2799

cot 142° = cos 142° / sin 142° ≈ −1.2799

xyOP

P(cos 142°, sin 142°) ≈ (−0.7880, 0.6157)

C(cot 142°, 1) ≈ (−1.2799, 1) — where line OP meets the line y = 1.

All four functions of 142°
FunctionExact valueDecimal
sin 142°—≈ 0.6157
cos 142°—≈ −0.7880
tan 142°—≈ −0.7813
cot 142°—≈ −1.2799

Reference angle: cot 38° ≈ 1.2799

See Also

Recalculate with different values ↑

Cotangent of nearby angles

Anglecot
134°≈ −0.9657
135°−1
140°≈ −1.1918
142°≈ −1.2799
144°−√(25 + 10√5)/5
145°≈ −1.4281
150°−√3

FAQ

What is cot 142°?

cot 142° ≈ −1.2799

Why does cot 142° 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°. 142° is not, so no such exact form exists; the value is used as a decimal: cot 142° ≈ −1.2799.

Why does a calculator show 1.3763 for cot 142?

The calculator is in radian mode (RAD): it takes cot 142 as the cotangent of 142 radians, cot 142 rad ≈ 1.3763. Switch it to degrees (DEG): cot 142° ≈ −1.2799. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.

See Also