## lala2 2 years ago HELP!

1. lala2

2. jkristia

if you know SOH CAH TOA, and you have cos given, then you can fill in the remaining legs and angle of the triangle using 'sin' and Pythagorean theorem. It might help if you start by drawing a right angled triangle. Call one of the angles for theta, and then fill in the one leg and the hypotenuse using the values given by cos (theta)

3. lala2

im really new to this think you give give me step by step instructions

4. jkristia

|dw:1369876988964:dw| Now to find the 'vertical' side of the triangle you can use Pythagorean. And once you have that length you can fill in the other trig ratios sin, cos, tan tan = sin / cos csc = 1/sin sec = 1 / cos cot = 1 / tan

5. jkristia

you are given cos (x) = 2/5, and you know cos (x) = adjacent / hyp, so there you are given 2 sides

6. jkristia

Think of trig functions as ratios. Cos (x) gives you a ratio of the adjacent (horz) side divided by the hyp side

7. jkristia

correct, so you found the 'opposite side' (I have to run, so I don't have time to double check right now)

8. jkristia

on the vertical side, that is the length you just found

9. jkristia

have to run - sorry

10. lala2

befor you leave whats the next step?

11. lala2

@satellite73 can you help me finish this?

12. lala2

@timo86m how do i finish this??

13. DEVESHkishore