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aleksley [76]
3 years ago
12

Can some one plz tell me the answer

Mathematics
2 answers:
VARVARA [1.3K]3 years ago
6 0
1/tan(42)*18=20
Hope it helps
koban [17]3 years ago
4 0

Answer:

Step-by-step explanation:

Step-by-step explanation:

Hello there!!

You can find it through simple way of ratio of sin or also by using cosine rule.

Lets do it simply as i can see your just 1st pic not second one so, i will answer you according to it.

so, here in question a Right angled triangle is given, with one angle 31° and one side 15 cm.

let's take sin angle as sin 31°.

so, p=h

h=15

We dont need base (b) here.

As we know that, thesin in ratio angle is

sin thita = p/h

or, sin 31°=h/15

or, 0.515038×15=h (using calculator sin 31°=0.515038.)

Therefore, the answer is 7.722557cm or 8cm.(as 7>5 and rounding off it we get 8).

Hope it helps...

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Step-by-step explanation:

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