Question

Adjacent / Hypotenouse=

a) Sin
b) Cos
c) Tan
d) Cot

Answer 1

b) Cos

Answer 2

Sin2x + Cos2x =

a) 0
b) 1
c) 2
d) 3

Answer 3

eyad don't just give out answers, give working out or help him through each step

Answer 4

@amorfide , each step ??
where are these steps ?

Answer 5

first you could explain how you know a/h is cosine

Answer 6

it is pointless giving out just an answer otherwise he will never get anywhere in the future on his possibl exams

Answer 7

@amorfide ,I would like to watch you giving out the explanation of why a/h is cosine ..
Explain for her ..

Answer 8

thanks anyway for answering my first question Eyad

Answer 9

@souzyi.s You 're welcome

Answer 10

Instead of getting into all of the details, use the acronym SOHCAHTOA
split this into three words
SOH CAH TOA
S=sin
o=opposite
h=hypotenuse
C=cosine
a=adjacent
h=hypotenuse
T=tan
o=opposite
a=adjacent

this comes from a right angled triangle triangle


Opposite will always be the side opposite the angle that is unknown,
the hypotenuse is the longest side
and adjacent will be the side that isn't already labelled (not mathematically correct way to word it)

the acronym sohcahtoa allows us to know which function to use
for example
if we are given two sides of a triangle,



we are given the side opposite the angle and we are given the hypotenuse
look at sohcahtoa
find opposite and hypotenuse together, we can clearly see that this would be soh
this means we use sin

OH is actually O/H
because sin of the angle is equal to opposite/hypotenuse

to solve this problem we will do
sinx=o/h
substitute your values into o and h to get what sin x is equal to, then you will do the inverse to work out x

hopefully you have a better understanding for trig

Answer 11

@amorfide ,lol .. This is not the explanation of why Cos=Adj/hyp ... you 're just giving out the answer , like when to use cos ,sin,tan ...
If you want to explain to someone anything ,you should explain the principle and concept .

Answer 12

I don't have the time to get into too much detail just thought a clearer picture would help him and an acronym would be more helpful than just saying the answer is cosine

Answer 13

@Eyad my answer is still easier to understand than yours, talk all you want