Sabendo que senx = 3/5 o valor do cosseno de "x" é ? (Utilize a relação fundamental sen²x + cos² = 1) a) 1/5
b) 2/5
c) 4/3
d) 4/5

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

i would be 2,000 just get the square root of 50 which is 2500 and the divid 4/5 and last thing multiply the answer you get for that by the square root of 50

step-by-step explanation:

the answer is -1 1/5, also a

hope i

-lavira : )