yes final project =sembreak ^^
obtain the positive solution less than 360 degree
1. sec^2 x-4=0

2. cot^2x=3

3. 2cos^2x=cosx

4. cot^2x=cotx

5. 4sin^2x-3=0

Question

yes final project =sembreak ^^
obtain the positive solution less than 360 degree
1.  sec^2 x-4=0

2.  cot^2x=3

3.  2cos^2x=cosx

4. cot^2x=cotx

5. 4sin^2x-3=0

anonymous · Answer

congratz sembreak ^^ hope many will answer ^^ god bless ^^

anonymous · Answer

$$sec^2x - 4=0$$$$\Leftrightarrow\frac{1}{cos^2x}=4$$$$\Leftrightarrow \frac{1}{4}=cos^2x$$

anonymous · Answer

<> <<<<is this equivalent? yehey 4 more to go

anonymous · Answer

The $\Leftrightarrow$ sign means that the two lines 'mutually imply' each other, which is a fancy way of saying that they effectively mean the same thing.

anonymous · Answer

Incidentally, what did you get for x when you solved that?

anonymous · Answer

from my project 1-40 this 5 question is 36-40.. so meaning i dont have an idea sory this is the hardest part

anonymous · Answer

Well if you have $$\frac{1}{4}=cos^2x$$, then you can take the square root of both sides:$$\Leftrightarrow \pm\frac{1}{2}=cosx$$|dw:1323259692157:dw| Which gives you 4 different solutions for x, each of which is equally valid. What are those 4 solutions?