+0  
 
0
116
1
avatar

Prove that these are equal using Trig identities 

 Oct 1, 2018
 #1
avatar+27475 
+3

Remember that \(\cos^2x+\sin^2x=1\)

 

Rearrange this in the form:  \(\sin^2x=1-\cos^2x\)

 

Substitute this into the left hand side (LHS) of your identity:

 

LHS:  \(1-\cos^2x-cos^2x\)

 

Simplify

LHS: \(1-2\cos^2x\)

 

So LHS = RHS

.

 Oct 2, 2018

35 Online Users

avatar

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.