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Amanda [17]
3 years ago
5

How would you express sin(-a-b)

Mathematics
1 answer:
tatuchka [14]3 years ago
4 0

Answer:

-4-7

Step-by-step explanation:do 4 and 7

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Does anyone know this
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Step-by-step explanation:

Given ΔDEF with ∠F=90°, the measure of ∠D=19°, and DE = 40 feet, since one of the angles of the triangle is 90°, the triangle is a right angled triangle as shown in the attachment.

Using SOH, CAH, TOA to get the unknown EF.

Since <D is opposite to side EF, EF will be the opposite while side DE will be the hypotenuse

Based on SOH:

Sin<D = Opposite/Hypotenuse

Sin<D = EF/DE

Sin19° = EF/40

EF = 40sin19°

EF = 13.0 feet to the nearest tenth of a foot

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