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In Triangle QRS, Angle R is a right angle, m angle Q = 57° and QS = 35. Which of the following expressions correctly
calculates the length of line QR ?

In Triangle QRS Angle R is a right angle m angle Q 57 and QS 35 Which of the following expressions correctly calculates the length of line QR class=

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sqdancefan

9514 1404 393

Answer:

  (3)  35·cos(57°)

Step-by-step explanation:

The relevant trig relation is ...

  Cos = Adjacent/Hypotenuse

For the given triangle, this is ...

  cos(57°) = QR/QS

Multiplying by QS gives ...

  QS·cos(57°) = QR

Filling in the value of QS, we have ...

  QR = 35·cos(57°)

Answer:

Option (3) 35 cos 57°

Explanation:

Hope it helps you!!!!v_v

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