Answer:
Proved See below
Step-by-step explanation:
Man this one is a world of its own :D Just a quick question are you a fellow Add Math student in O levels i remember this question from back in the day :D Anyhow Lets get started
For this question we need to know the following identities:

Lets solve the bottom most part first:

Take LCM

now break the LCM

because 1/tan = cot x
and furthermore,

now we solve the above part and replace the bottom most part that we solved with 

Hence proved! :D
Answer:
8
Step-by-step explanation:
total number of pencils = 186
number of students = 23
number of pencils each student gets = number of pencils ÷ number of pencils
=186/23
=8.08
so each student gets 8 pencils
<span>2x + x = 12
=> x =12/3 =4
so, original number is 84.</span>
Answer:
you need a d/protector to do this
Step-by-step explanation:
No not all lines of symmetry are diagonals for example a kite, but most shapes have line of symmetry. sorry if i didnt give enough information buut hope it helps;)