Trigo - solving triangles Flashcards Preview

Trigonometry - Basic > Trigo - solving triangles > Flashcards

Flashcards in Trigo - solving triangles Deck (7)
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1
Q

Find angle ACB correct to 1 decimal place

A

cos ACB = 6/10

ACB = cos-1(6/10)

= 53.1º

2
Q

Find the length AB correct to 3 significant figures

A

AB2 = 102 - 62

= 64

AB = sqrt (64)

= 8.00 cm

3
Q

Find angle QPR correct to 1 decimal place

A

sin QPR = 5/13

ACB = sin-1(5/13)

= 22.6º

4
Q

Find the length PR correct to 3 significant figures

A

PR2 = 132 - 52

= 144

PR = sqrt (144)

= 12.0 cm

5
Q

Find angle TUV correct to 1 decimal place

A

tan TUV = 7/24

TUV = tan-1(7/24)

= 16.3º

6
Q

Find the length UT correct to 3 significant figures

A

UT2 = 242 + 72

= 625

UT = sqrt (625)

= 25.0 cm

7
Q

Find the value of x correct to 3 significant figures

A

cos 33 = x/21

x = 21 * cos 33

= 17.6