What is Tan 25 degrees?

Tan is short for tangent. Here we tell you what tan 25 degrees is, how we came up with the answer, and how knowing tan of 25 degrees can be useful.

To calculate tan (25) degrees of a right angled triangle, we use the following equation where angle is 25:

Tan(angle) = Opposite/Adjacent

Tan 25 degrees is simply the ratio of the side opposite of the angle to the side adjacent to the angle. As long as the angle stays at 25 degrees, the ratio does not change and tan 25 degrees is a fixed number. See figure 1 for a better illustration. The answer to "What is tan 25 degrees?" is as follows:

Tan(25 deg) ≈ 0.466307658155

Now you also know that the following is true:

0.466307658155 ≈ Opposite/Adjacent

This is useful because if you know either Opposite or Adjacent length, you can enter it in the equation above and solve for the missing length.

You can also re-write the equation above to solve for Opposite and Adjacent to get the following new equations:

Opposite ≈ 0.466307658155 x Adjacent

Adjacent ≈ Opposite / 0.466307658155

Figure 1

Tan of the angle in the illustration above is calculated by dividing the length of the Opposite by the length of the Adjacent.

If the angle is 25, then the tan of 25 degrees will be 0.466307658155.

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What is Tan 26 degrees?
Go here for the next angle we converted.

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