Question

Can u please help me solve ? I'm reviewing for a final, ty

Answer 1

Part A

we have that

Both students verify the identity properly

student A ----> expand the left side of the identity

student B ----> expand the right side of the identity

but the result is the same

both students proved that the given equation is an identity

Part B

Identities

`\begin{gathered} sin^2x+cos^2x=1\text{ ----> identity N 1 in step 3} \\ cos^2x=1-sin^2x \end{gathered}`

and

`cscx=(1)/(sinx)\text{ -----> identity N 2 step 5}`