Question

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Answer 1

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°

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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 )

Answer 2

Answer:look at step by step

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