Question

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Answer 1

Answer:look at step by step

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

Answer 2

∠ A = 60°

Explanation:

Using the sine ratio in the right triangle

sinA =
`(opposite)/(hypotenuse)` =
`(BC)/(AC)` =
`(13)/(15)` , thus

∠ A =
`sin^(-1)` (
`(13)/(15)` ) ≈ 60°

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Using the cosine ratio in the right triangle

cosR =
`(adjacent)/(hypotenuse)` =
`(RT)/(RS)` =
`(8)/(10)` , thus

∠ R =
`cos^(-1)` (
`(8)/(10)` ) ≈ 36.9° ( to 1 dec. places )