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3 years ago

GEOMETRY!!! 15 PTSSSSS

Mathematics

2 answers:

ss7ja [257]3 years ago

4 0

Answer:

23) option c

JL ≈ 9.3

25) option c

y ≈ 9.6

Step-by-step explanation:

Given in the question that,

cos(21°) = 9 / y

y = 9/cos(21°)

y = 9.64

y ≈ 9.6(nearest tenth)

Given in the question that the hypotenuse of right angle triangle = 12

To find,

height of the right angle triangle

angle k = 39°

so by using trigonometry identity

cos(39) = opp/hypo

cos(39) = JL / KL

JL = cos(39)(12)

JL = 9.32

JL ≈ 9.3

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lapo4ka [179]3 years ago

4 0

Answer:

Q 23. Last option 7.6

Q 25 Third option

Step-by-step explanation:

To solve Q 23

From the figure we can write,

Sin 39 = Opposite side/Adjacent side

= JL/KL

= JL/12

JL= 12 * Sin 39

= 12 * 0.629 = 7.55

= 7.6

To solve Q 25

Cos 21 = 9/y

y = 9/Cos 21 = 9/0.9335

= 9.64

= 9.6

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