Please someone help me...

Step-by-step explanation:

First factor out the negative sign from the expression and reorder the terms

That's

Using trigonometric identities

That's

Rewrite the expression

That's

We have

Rewrite the second fraction

That's

Since they have the same denominator we can write the fraction as

Using the identity

Rewrite the expression

We have

Using the trigonometric identity

Rewrite the expression

That's

Which is

Using the trigonometric identity

Rewrite the expression

That's

Simplify the expression using symmetry of trigonometric functions

That's

Remove the parenthesis

We have the final answer as

As proven

Hope this helps you

  see proof below

Step-by-step explanation:

Use the following identities:

Proof  LHS →  RHS

Given:                  

Cot Identity:        

Simplify:              

Sum Difference Identity:    cot(6A - 2A)

Simplify:                               cot 4A

cot 4A = cot 4A  

- 70

this is the answer for you hope it