Question

if tan A = cot A then find.cos A​

Answer 1

Answer:

1/√2

Step-by-step explanation:

tanA = cotA

=> tanA = tan (90°-A) [cot A = tan (90°-A)]

=> A = 90°-A

=> A+A = 90°

=> 2A = 90°

=> A = 90°/2

=> A = 45°

Now, cosA = cos45° = 1/√2