The Purplemath Forums

Helping students gain understanding and self-confidence in algebra.

Skip to content

Compound Angle Formula Help  TOPIC_SOLVED

Trigonometric ratios and functions, the unit circle, inverse trig functions, identities, trig graphs, etc.
Post a reply

Compound Angle Formula Help

Postby grimlock9909 on Fri Mar 04, 2011 1:10 am

Hello, I'm doing a correspondence math course and I'm just having difficulty understanding the steps to take in order to simplify this expression.
sin(pi/4)cos(pi/12)+cos(pi/4)sin(pi/12).
grimlock9909
 
Posts: 1
Joined: Fri Mar 04, 2011 1:03 am
Top

Sponsor

Sponsor
 
Top

Re: Compound Angle Formula Help  TOPIC_SOLVED

Postby nona.m.nona on Fri Mar 04, 2011 12:18 pm

grimlock9909 wrote:...simplify this expression.
sin(pi/4)cos(pi/12)+cos(pi/4)sin(pi/12).

I would suggest that you review your angle-sum and angle-difference identities, and see which might apply.
nona.m.nona
 
Posts: 241
Joined: Sun Dec 14, 2008 11:07 pm
Top
Post a reply

Return to Trigonometry

Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group. Color scheme by ColorizeIt!