Maths-
General
Easy
Question
In the right triangle above, x = 60. What is the length of side AB?
- 7
- 8
- 9
- It cannot be determined from the information given.
The correct answer is: 8
Hint:
Triangle with one angle of 90॰ is called right angle triangle.
Side opposite to 90॰ is called Hypotenus.
In right angled triangle,
Sin 
Cos 
Step by step explanation:
Given:
In △ABC,
∠B= 60॰
Side BC = 4 units
Step 1:
We know that, in right angle triangle
So, according to given information,
Step 2:
Put value of cos 60॰= 
Step 3:
Now, cross multiply each other
⇒ AB = 8
⇒ AB = 8 units.
Hence, the length of side AB is 8 units.
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