4 years ago

Which trigonometric ratios are correct for triangle ABC? Check all that apply.

1 answer:

5 0

Assuming the - are bullet points and not negative signs:
sin = opposite/hypotenuse
cos = adjacent / hypotenuse
tan = opposite / adjacent.
Also remember the special properties of the 30 - 60 - 90 triangle.
This tells us that side AB = 9√3

Combining this info:
sin (C) = 9√3 ÷ 18 = √3 ÷ 2
cos(B) = 9 √3 ÷ 18 = √3 ÷ 2
tan(C) = 9 √3 ÷ 9 = √3
sin(B) = 9 ÷ 18 = 1/2
tan(B) = 9 ÷ 9√3 = 1 / √3 = √(3) ÷ 3

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Please find the length of the diagonal, thanks. Will give brainliest

rodikova [14]

Answer is 12.73
Use Pythagorean theory
Split square into two right triangles with diagonal line. To find the diagonal
a^2 + b^2 = c^2
9^2 + 9^2 = c^2
162= c^2
Take square root of both sides
12.73 = c