Answer:
Trigonometry, as the name might suggest, is all about triangles. More specifically, trigonometry is about right-angled triangles, where one of the internal angles is 90°. Trigonometry is a system that helps us to work out missing or unknown side lengths or angles in a triangle.
Step-by-step explanation:
Answer:
The number will be 
Step-by-step explanation:
Let us assume the number as
.
Given:
⇒
less than twice a number that will be
, which is equal to half the difference of three times the number and 13
We have to find the number.
Solution:
The difference of three times the number and 13 could be represented as : 
The value be equal to
of this
⇒ 
As we can see here,
- That we got a equation ⇒

Now, we can solve the above equation:

We have multiply both sides by
⇒ 
then, ⇒ 
⇒
Hence we can say that number which was assumed as
will be 
Answer:
11
Step-by-step explanation:
2+75= 7y
77 = 7y
77/7 = 7y/7
y = 11
Answer:
9 inches
Step-by-step explanation:
4 x 3 = 12
so 3 x 3 = 9
I need to know what f(x) and g(x) is first