Answer:
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...