Question

find cos Θ if sin Θ= -2/3 and falls in quadrant 4

Answer 1

sin^x+cos^x =1

Answer 2

also cos is +ve in 4th quadrant

Answer 3

find the third side of the triangle via pythagoras in your head
the square root of three squared minus two squared is the square root of nine minus four is the square root of five

Answer 4

@satellite73 can you write that in a equation please. I'm a visual learner not from reading words

Answer 5

i wrote it in words because i was trying to convince you that you could do it by thinking aloud

Answer 6

yeah I'm not that type of learner

Answer 7

you can write
\[\sqrt{3^2-2^2}=\sqrt{9-4}=\sqrt5\]

Answer 8

okay then \[1=\sqrt{5}\]

Answer 9

then what?

Answer 10

@satellite73