Find the value of the tangent for a

answer:

a

step-by-step explanation:

we require to find ac using pythagoras' identity

the square on the hypotenuse is equal to the sum of the squares on the other 2 sides, thus

ac² + 12² = 40²

ac² + 144 = 1600 ( subtract 144 from both sides )

ac² = 1456 ( take the square root of both sides )

ac = = = 4

tan a = = =

= × = → a

7/2

(decimal: 3.5)

welcome ; )

step-by-step explanation:

the anwser is x< -17/2