Question 203931
Use the fundamental identities to find all of the trigonometric ratios if the variable satisfies the given conditions.
a) sin x=12/13 and cos x<0
cos^2 = 1 - sin^2
cos^2 = 1 - 144/169 = 25/169
cos = 5/13
x = arccos(5/13) = arccos(-5/13)
x = ~ -67.38º
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b)cos x =-4/3 , sinx>0
c)tan x = -24/7 , sinx>0
d)tan x = 4/3 , sinx>0
e)cot x= 4 , sinx>0
f)cos x=3/5