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kaziyahf2006
03.04.2020 •
Mathematics
In ΔHIJ, the measure of ∠J=90°, JI = 4, HJ = 3, and IH = 5. What ratio represents the tangent of ∠I?
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Ответ:
The ratio
represents the tangent of ∠I
Step-by-step explanation:
Let us revise the trigonometry ratio
sin Ф =In Δ HIJ
∵ m∠J = 90°
- Hypotenuse is the side which opposite to the right angle
∴ HI is the hypotenuse
∵ HJ = 3 units
∵ IH = 5 units
- Let us use Pythagoras Theorem to find HJ
∵ (HJ)² + (IJ)² = (IH)²
∴ 3² + (IJ)² = 5²
∴ 9 + (IJ)² = 25
- Subtract 9 from both sides
∴ (IJ)² = 16
- take √ for both sides
∴ IJ = 4 units
To find the tangent of ∠I find the opposite and adjacent sides to it
∵ HJ is opposite to ∠I
∵ IJ is adjacent to ∠I
- use the rule of tan above
∴ tan(∠I) =![\frac{HJ}{IJ}](/tpl/images/0578/9515/211e1.png)
∴ tan(∠I) =![\frac{3}{4}](/tpl/images/0578/9515/f11e3.png)
The ratio
represents the tangent of ∠I
Ответ: