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Anton [14]
3 years ago
11

I really need help please

Mathematics
2 answers:
Citrus2011 [14]3 years ago
7 0

Answer:

∠ A = 60°

Step-by-step explanation:

Using the sine ratio in the right triangle

sinA = \frac{opposite}{hypotenuse} = \frac{BC}{AC} = \frac{13}{15} , thus

∠ A = sin^{-1} ( \frac{13}{15} ) ≈ 60°

------------------------------------------------

Using the cosine ratio in the right triangle

cosR = \frac{adjacent}{hypotenuse} = \frac{RT}{RS} = \frac{8}{10} , thus

∠ R = cos^{-1} ( \frac{8}{10} ) ≈ 36.9° ( to 1 dec. places )

andrew11 [14]3 years ago
3 0

Answer:look at step by step

Step-by-step explanation:how do I post questions and I’ll help you

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