Monday
March 30, 2015

Homework Help: Precalculus with Trigonometry

Posted by Natalie on Thursday, April 4, 2013 at 6:11pm.

Prove or disprove the following Identities:

cos(-x) - sin(-x) = cos(x) + sin (x)

sin raised to the 4 (theta) - cos raised to the 4 (theta) = sin squared (theta) - cos squared (theta)

cos (x+(pi)/(6)) + sin (x - (pi)/(3)) = 0

cos(x+y)cos(x-y) = cos squared (x) - sin squared (y)

Sorry if you don't understand anything

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

algebra - Can someone please help me do this problem? That would be great! ...
Mathematics - Trigonometric Identities - Let y represent theta Prove: 1 + 1/tan^...
Calculus - I wanted to confirm that I solved these problems correctly (we had to...
trigonometry - can you correct the rest for me please? Express each as a ...
trigonometry - can you correct the rest for me please? Express each as a ...
math(Trigonometry) - sin 2 theta + cos theta = 0 so, we use sin 2 theta = 2 sin ...
Algebra II - Multiple Choice Which expression is NOT equivalent to 1? (theta) ...
Precalculus 2 - Similiarly to a question I asked previously I took the same ...
Algebra II - Which of the following expressions are not equal to 1? A) sin^2 ...
Trig - Which expression equivalent to: cos(theta + pi/2). A)cos theta B)-cos ...

Members