Question

the diagram shows a right angled triangle. 9cm 15cm x degrees. Find the size of angle x. Give your answer correct to 1 decimal place.​

Answer 1

Answer:

31°

Step-by-step explanation:

As the opposing side and adjacent side of the angle x are given, we need to take the tan ratio of the angle.

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Solving :

⇒ tan x° = 9/15

⇒ tan x° = 3/5

⇒ x = tan⁻¹ (0.6)

⇒ x = 31°

Answer 2

Given:

• Opp= 9 cm
• Adj= 15 cm

Note that:

• Opp= Opposite
• Adj= Adjacent

To find:

The size of the unknown angle "x"

Solution:

We'll have to check which is the appropriate one from SOHCAHTOA.

In this question we'll have to use tan because opposite and adjacent is given.

$\large\boxed{Formula: tan(A)= \frac{opp}{adj}}$

Substitute according to the formula.

$tan \: x= \frac{9}{15}$

We'll have to use tan inverse.

$x={tan}^{-1}(\frac{9}{15})$

$x=30.96375653$

$\large\boxed{x=31° }$

Hence, the size of the unknown angle "x" is 31°