# Thread: Not sure how to do these

1. ## Not sure how to do these

Write the trigonmetric expression in terms of sine and cosine and then simplify
1. CosTcscT

Simplify
1. Cos^3x+Sin^2cCosx

2. Write the trigonmetric expression in terms of sine and cosine and then simplify
1. CosTcscT

$\cos{t} \cdot \frac{1}{\sin{t}}$

Simplify
1. Cos^3x+Sin^2cCosx

$\cos{x}(\cos^2{x} + \sin^2{x})$

finish up

3. Originally Posted by skeeter
Write the trigonmetric expression in terms of sine and cosine and then simplify
1. CosTcscT

$\cos{t} \cdot \frac{1}{\sin{t}}$

Is it really that simple?

So on CosT TanT would the anser be Sin?

4. Originally Posted by Nightasylum
Originally Posted by skeeter
Write the trigonmetric expression in terms of sine and cosine and then simplify
1. CosTcscT

$\cos{t} \cdot \frac{1}{\sin{t}}$

Is it really that simple?
you have one more step to do ... what is $\frac{\cos{t}}{\sin{t}}$ ?

So on CosT TanT would the anser be Sin?
"Sin" means nothing ... if you said $\sin{t}$ , then you would be correct.

Always use proper mathematical notation ... don't get lazy.

5. Originally Posted by skeeter
you have one more step to do ... what is $\frac{\cos{t}}{\sin{t}}$ ?
Cot= Cos/sin

6. Originally Posted by Nightasylum
Cot= Cos/sin
And if I was grading this, I would not give you full credit. As skeeter said, always write the trig functions with the angles!!!!

By the way,
So on CosT TanT would the anser be Sin?
Where did this come from? Is this a separate problem? I first thought that it came from your other question:
Simplify
1. Cos^3x+Sin^2cCosx
but if that's the case, $\cos t \tan t$ would be incorrect.

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