Suppose that θ is an acute angle and that cos θ = 9/ √85. Use a right triangle to find all the other trigonometric functions of θ.

Question

sin 0= ?

tan 0= ?

sec 0= ?

cot 0= ?

csc 0= ?

Answer 1

The other leg is sqrt(85-81)=2.

Now you can easily write all the trig functions.