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Ipatiy [6.2K]
3 years ago
13

Which expressions can be used to find m∠ABC? Select two options. cos−1(StartFraction 9.8 Over 6.3 EndFraction) cos−1StartFractio

n 6.3 Over 9.8 EndFraction) cos−1(StartFraction 7.5 Over 9.8 EndFraction) sin−1(StartFraction 9.8 Over 7.5 EndFraction) sin−1(StartFraction 7.5 Over 9.8 EndFraction)
Mathematics
2 answers:
Wittaler [7]3 years ago
7 0

Answer:

B.  Cos ^{-1} \frac{6.3}{9.8}

E.  Sin^{-1} \frac{7.5}{9.8}

Step-by-step explanation:

The trigonometric functions are applied when given a side and one of the angles of a right angled triangle.

Sine θ = \frac{opposite}{hypotenuse}

Cosine θ = \frac{adjacent}{hypotenuse}

Tangent θ = \frac{opposite}{adjacent}

Given that; hypotenuse = 9.8, opposite side = 7.5 and adjacent side = 6.3.

Then,

Sin θ = \frac{7.5}{9.8}

⇒ θ = Sin^{-1} \frac{7.5}{9.8}

Also,

Cos θ = \frac{6.3}{9.8}

⇒ θ = Cos ^{-1} \frac{6.3}{9.8}

So, the appropriate answers to the given questions are options B and E.

Rudiy273 years ago
7 0

Answer:

b

Step-by-step explanation:

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