Thursday

September 18, 2014

September 18, 2014

Posted by **Sarah Fuller** on Tuesday, March 9, 2010 at 8:32pm.

cos*2x=csc*2x-2/csc*2x

- trig -
**bobpursley**, Tuesday, March 9, 2010 at 8:43pmI think you must be usint * as the power to, as in ^

right side: (csc^2 x - 2)/csc^2 x

(1-2sin^2x) = 1-2(1-cos^2x)=-1+2cos^2x

which is clearly not an identity.

So I am not certain what your problem is.

- trig -
**Reiny**, Tuesday, March 9, 2010 at 8:47pmYour use of * in the last 3 posts will cause confusion

traditionally

* means multiplication

/ means division and

^ means "to the exponent"

so you want to say

cos^2 x=csc^2 x-2/csc^2 x

but that statement is not true for all x's, I just tried any x and it did not work.

Use brackets to establish the proper order of operations.

**Answer this Question**

**Related Questions**

trig - prove the identity: csc x-1/csc x+1 = cot^x/csc^x+2 csc x+1

Alg2/Trig - Find the exact value of the trigonometric function given that sin u...

Trigonometry - Hello all, In our math class, we are practicing the trigonometric...

trig 30 - For csc^2 A-1/cot A csc A, what is the simplest equivalent trig ...

verifying trigonometric identities - How do I do these problems? Verify the ...

Math - cos(tan + cot) = csc only simplify one side to equal csc so far I got ...

Pre-Calculus - I don't understand,please be clear! Prove that each equation is ...

Trigonometry - I need to prove that the following is true. Thanks. csc^2(A/2)=...

Pre-Calculus - Prove that each equation is an identity. I tried to do the ...

trig - Prove 1+cos X/1-cos X = (csc X + cot X)squared