Please help! i will fan and medal!
θ is in Quadrant III and cos^2(θ)=1/4
A. Evaluate cotθ.
B. In two or more sentences, explain how to find the value of cotθ.

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.

- anonymous

- jamiebookeater

See more answers at brainly.com

Get this expert

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this

and **thousands** of other questions

- anonymous

hey are you single

- anonymous

no im not haha @hadewehjsds

- anonymous

wow ight

Looking for something else?

Not the answer you are looking for? Search for more explanations.

## More answers

- anonymous

im sorry to say but
MARIO

- anonymous

Square root both the sides,
after that you will get 2 values for cos theta, a positive and a negative value
but you are given theta in in 3rd quadrant so use that fact to figure out the right value
For reference:
In 1st Quadrant all trig functions are positive
In 2nd only sine and cosecant are positive
In 3rd only tangent and cotangent are positive
In 4th only cosine secant are positive
A good mnemonic to remember is
After School To College
A for all postive
S for sine and it's reciprocal positive
T for tangent and it's reciprocal positive
C for cosine and it's reciprocal positive

- anonymous

okay so cos(θ)=1/2. how does that help me know what cotθ is? @Nishant_Garg

- anonymous

Are you sure it's 1/2 and not -1/2??
Check carefully,
After that if you remember your trig table the values of 30, 45, 60, 90 for your trig functions u should be able to find your angle and then use the same table to find cot theta
Really it's more of a memory game here

- anonymous

mario
im random

- anonymous

i dont know what trig table you are talking about @Nishant_Garg

- anonymous

Basically trig values for the angles
30, 45, 60, 90 are somewhat basic and you should remember them for at least sine cos tan so really it's easy if u remember the values u can clearly tell which angle it is

- anonymous

or u can use a calculator if u r allowed

- princeharryyy

|dw:1437072680945:dw|

- anonymous

First tell me if you have figured out the correct equation
\[\cos(\theta)=\frac{1}{2}\]
or
\[\cos(\theta)=-\frac{1}{2}\]
Then I can guide you further

- anonymous

\[\cos (\theta)=-1/2\]

- anonymous

ok so now you can see how to modify the equation
do you know at which angle cos will give 1/2?

- anonymous

no i dont @Nishant_Garg

- anonymous

ok so cos will give 1/2 at angle 60 degree or in radians pi/3
\[\cos(\theta)=-\cos(60)\]
Now here are some formulae's you should know
\[\cos(180+\theta)=\cos(180-\theta)=-\cos(\theta)\]
Let's add and subtract 180 on the right side angle
\[\cos(\theta)=-\cos(60+180-180)\]
You can modify it as
\[\cos(\theta)=-\cos(180-120)\]
Now use the formula
\[\cos(180-\theta)=-\cos(\theta)\]\[\cos(\theta)=-(-\cos(120))=\cos(120)\]

- anonymous

I actually got a friend to help me. thank you so much for the help! @Nishant_Garg

- anonymous

Ah, you're welcome!

Looking for something else?

Not the answer you are looking for? Search for more explanations.