Question

given sec A = 29/21 , evaluate : A - 1 / tan A​

Answer 1

Answer:

Step-by-step explanation:

We know that 20, 21, 29 are Pythagorean Triplets.

So if sec A = 29/21, then from trigonometry we can say,

sin A = 20/29

tan A = 20/21

Substituting the values,

= ((20/29) - 1 ) / (20/21)

= (-9/29) / (20/21)