cot s = -1/3, s in quadrant IV

what is sin s in quadrant IV?

well..

cot s= cos s/sin s

since it's quadrant IV, cos is + and sin is -

-1/3 = 1/-3

sin s= -3

is this correct? i think i'm doing it right.

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- March 19th 2010, 12:06 AMsomanyquestions[SOLVED] finding sin s
cot s = -1/3, s in quadrant IV

what is sin s in quadrant IV?

well..

cot s= cos s/sin s

since it's quadrant IV, cos is + and sin is -

-1/3 = 1/-3

sin s= -3

is this correct? i think i'm doing it right. - March 19th 2010, 01:42 AMGrandad
Hello somanyquestionsYou need to use Pythagoras' Theorem to find the length of the third side:

(I've put the minus sign in brackets, because at this stage we don't need to worry about it.)

- March 19th 2010, 10:05 AMrasczak
Wow, Thanks! You've made this a lot clearer for me. :)