## anonymous 4 years ago without using a calculator find sin beta and cos beta if tan beta=3/4 and sin beta= >0.

1. anonymous

think of a 3 - 4 - 5 right triangle, take the appropriate ratios

2. anonymous

how did you get 3-4-5?

3. anonymous

|dw:1347251372575:dw|

4. anonymous

oh wait isn't tangent like the adjacent angles or something?

5. anonymous

you have tangent it $$\frac{3}{4}$$ draw the above triangle, you get the hypotenuse is 5 either by pythagoras or by memory

6. anonymous

no, it is not adjacent angles. if you are using right triangle trig, tangent is the length of the "opposite" side over the "adjacent" side

7. anonymous

okay umm so whats sin?