If both x and y are in quadrant IV, and sin x = -2/3 and cos y = 1/4. Find cos (x-y)

At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

Get our expert's

answer on brainly

SEE EXPERT ANSWER

Get your free account and access expert answers to this and thousands of other questions.

A community for students.

If both x and y are in quadrant IV, and sin x = -2/3 and cos y = 1/4. Find cos (x-y)

Mathematics
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

Get this expert

answer on brainly

SEE EXPERT ANSWER

Get your free account and access expert answers to this and thousands of other questions

cosxcosy+sinxsiny
cos( x-y)= cos x cosy+ sinx siny
sin x= -2/3 cox x =sqrt(1 +4/9)=sqrt(13)/3

Not the answer you are looking for?

Search for more explanations.

Ask your own question

Other answers:

oh sorry
cosx = sqrt(1-4/9)= sqrt(5)/3
cosy =1/4 siny =- sqrt(1-1/16)=sqrt(15)/4
put the values in formula
ok thanks....another questions is to find sin (x+y) with the same variables... can you help me get started on that one also?
oops, once would have been enough
sin(x+y)= sinxcosy-cosxsiny
values are same
thank you
so for cos (x-y) would it be: (√5/3)(1/4)+(-2/3)(√15/4)=(√5/12)+(-2√15/12)= √5-2√15/12
siny is negative in fourth quadrant sin y =-sqrt(15)/4
ok so it would be √5+2√15/12
for sin (x+y) would it be (-2/3)(1/4)-(√5/3)((√15/4)= -2/12-√75/12=-2-5√3/12 are my negatives and positives right?
u again missed that siny is negative
-2/12+√75/12
for sin (x+y) would it be (-2/3)(1/4)-(√5/3)((√15/4)= -2/12-√75/12=-2-5√3/12 are my negatives and positives right?

Not the answer you are looking for?

Search for more explanations.

Ask your own question