IMPORTANTTT

[Saladin]

Let me get this straight, are your values as follows?

and

[Saladin]

Would you be kind enough to give the .pdf file of the question in concern?

[cooldude]

if sin p = 2/3  and                   pie/2 <= p <= pie                , then tan p is equal to

A) -2/sqrt 5
B)  2 / sqrt 13
c) sqrt 5/2
D)- 1 /sqrt 13
E) 2/sqrt 5

sin p=2/3
(sin p)^2+(cos p)^2=1
cos p=root 1-(4/9)=root 5/9
tan p=sin p/cos p=2/3 / (root 5)/3
=2/root 5 therefore e

[mousa]

yepppp 
u heading there 2 ?

I might. I  have done all placement tests.Though i applied for medicine aswell,  but still not confirmed till the results are out!!!

By the way, when is your placement test??

[halosh92]

hey engraved nop its  hard copy actually :S

one more question:

cos( 5pie/4) is equal to
a) -1
b) 1/2
c) -1/2
d) -1/sqrt2
e) none of these
is it e


another question:

find all the solutions of the equation    sin(2x)= 1
given that x is in the interval (0, 2 pie)\
a) pie/2 only
b) pie/4 only
c) pie/4 and 3pie/4
d) pie/4 and 5pie/4
e) none of these.
thxxxx cool dude By the way xD

[Saladin]

For the first Question:

The answer is (e). basically means that the value is a negative version of cos(). Because up till the values for cos are positive, as it is in the ALL quadrant. However, this does not lie in that quadrant, so it is negative version of .

For the second question:

The only answer is (c).





or (I like working in degrees)

Remembering the sin wave, by making the equation , you put two sin waves into the 0 to 360 gap. Therefore, where 360 degrees was, that position is 180 degrees. Therefore, if we repeat the wave, we repeat the values. Therefore degrees is also an answer.

So, the two answers are:

and

The working without the explanation is as follows:



 

 

Therefore, and

45 degrees is equal to radians and 225 degrees is equal to

Hope this clears all doubts.

[halosh92]

For the first Question:

The answer is (e). basically means that the value is a negative version of cos(). Because up till the values for cos are positive, as it is in the ALL quadrant. However, this does not lie in that quadrant, so it is negative version of .

For the second question:

The only answer is (c).





or (I like working in degrees)

Remembering the sin wave, by making the equation , you put two sin waves into the 0 to 360 gap. Therefore, where 360 degrees was, that position is 180 degrees. Therefore, if we repeat the wave, we repeat the values. Therefore degrees is also an answer.

So, the two answers are:

and

The working without the explanation is as follows:



 

 

Therefore, and

45 degrees is equal to radians and 225 degrees is equal to

Hope this clears all doubts.

thankyouuuu yes very clear

[Saladin]

thankyouuuu yes very clear

Glad to be of service!