Question

evaluate cot(cos^-1(-15/17))

Answer 1

Enter your answer as a fraction using the slash bar ( / ).

Answer 2

Have you considered drawing a right triangle?

Answer 3

i got -15/8 but not sure if correct or not

Answer 4

Draw a right angled triangle by letting
\[\theta=\cos^{-1}-\frac{15}{17}\]

Answer 5

then find the missing side, so that you can find cot.

Answer 6

cot(theta)*

Answer 7

missing side is 16 ?

Answer 8

Use Pythagoras:
\[a^2+b^2=c^2\]

Answer 9

i think i can get it now thanks :)

Answer 10

No worries. And to determine whether you get a positive or negative value, use your knowledge of ASTC.