Trigo - angle of elevation and depression Flashcards Preview

Trigonometry - Basic > Trigo - angle of elevation and depression > Flashcards

Flashcards in Trigo - angle of elevation and depression Deck (8)
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1
Q

What is the angle of elevation corrrect to 1 decimal place?

A

angle = tan-1 (10/10)

= 45.0º

2
Q

What is the height of the tree correct to 3 significant figues?

A

tan 39 = ht/50

ht = 50 * tan 39

= 40.5 m

3
Q

What is the height of the wall correct to 3 significant figues?

A

sin 20 = ht/8

ht = 8 * sin 20

= 2.74 m

4
Q

What is the angle of elevation corrrect to 1 decimal place?

A

angle = sin-1 (40/50)

= 53.1º

5
Q

What is the angle of depression corrrect to 1 decimal place?

A

angle = tan-1 (35/40)

= 41.2º

6
Q

How far is the eagle from the rabbit correct to 3 significant figues?

A

sin 50 = 250/dist

dist = 250/sin 50

= 326 m

7
Q

How far is the treasure from the foot of the cliff correct to 3 significant figues?

A

tan 44 = 44/dist

dist = 44/tan 44

= 45.6 m

8
Q

What is the horizontal distance of the plane to C correct to 3 significant figues?

A

tan 10 = 10/dist

dist = 10/tan 10

= 56.7 m