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vfiekz [6]
2 years ago
15

Solve 17 and 18 please.

Mathematics
1 answer:
Klio2033 [76]2 years ago
5 0

Answer:

Step-by-step explanation:

<em>17.</em>

sin20° = \frac{1}{x}

x = 1 ÷ sin20°

<em>x</em> ≈ <em>2.9238</em>

cos20° = \frac{x}{y}

y = x ÷ cos20°

<em>y</em> ≈ 2.9238 ÷ cos20° ≈ <em>3.11</em>

<em>18.</em>

<em>x = 2√3</em> ≈ 3.46

<em>y = √3</em> ≈ 1.732

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We can use either angle, but I'm going to use the one on the bottom. So, in order to find x, we need to use tangent. One side we know is the adjacent, and the side we don't know is the opposite, therefore we need tangent. Here's the equation:

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