Question

If cos Θ = -4/7, what are the values of sin Θ and tan Θ?

Answer 1

I closed this by accident but I still need help @wolf1728 =c if you can

Answer 2

If the cosine of of Θ = -4/7 or -0.5714285714
Then Θ = arc cosine (-0.5714285714) =
124.85 Degrees
so
sin Θ or 124.85 degrees = 0.82065 and
tan Θ or 124.85 degrees = -1.4361
hope that helps

Answer 3

Would that be sin = +/- sqrt33/7 and tan = +/- sqrt33/4?

Answer 4

or cosine Θ = -4/7
cosine Θ = adjacent / hypotenuse
If adjacent = -4 and
hypotenuse = 7 then
opposite² = hyp² - adj²
opposite² = 49 -16
opposite² = 33
opposite = 5.7445626465

sine = opp / hyp and tan = opp / adj

so sine Θ = 5.7445626465 / 7
and tan Θ = 5.7445626465 / -4

Answer 5

sin Θ = sqrt(33) / 7
tan Θ = sqrt(33) /-4

Answer 6

Thank you! Could you help me with one last one?: http://openstudy.com/study#/updates/537cfcc8e4b0baf62d52d909