Question

cos(theta)=4/5 where theta is in the IV quadrent. find the rest of the trig fuctions

Answer 1

make a triangle

Answer 2

label the adjacent side 4 and the hypotenuse 5

Answer 3

find the third side by pythangoras, or recalling the mother of all right triangles 3 - 4 - 5

Answer 4

now take any trig ration you like
recalling that you are in quad 4 so sine is negative and cosine is positive etc