Question

Ctg(45°-a)=...............​

Answer 1

......................

Answer 2

To find the value of the expression, we'll use the trigonometric identity for the co-function of an angle:

Cotangent (cot) is the reciprocal of tangent (tan):

cot(θ) = 1 / tan(θ)

Now, let's find the value of cot(45° - a):

cot(45° - a) = 1 / tan(45° - a)

Since tangent of the complementary angle (θ) is equal to the tangent of the original angle (90° - θ):

tan(45° - a) = tan(90° - (45° - a)) = tan(90° - 45° + a) = tan(45° + a)

Now, we have:

cot(45° - a) = 1 / tan(45° + a)

So, the final expression for cot(45° - a) is 1 / tan(45° + a).