Question

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

Answer 1

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

Answer 2

how did you get 3-4-5?

Answer 3

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

Answer 4

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

Answer 5

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

Answer 6

okay umm so whats sin?