Register to reply

Use standard identities to express

by menco
Tags: express, identities, standard
Share this thread:
menco
#1
Apr4-12, 08:08 PM
P: 45
1. The problem statement, all variables and given/known data
Use standard identities to express sin(x+pi/3) in terms of sin x and cos x


2. Relevant equations

sin(a+b)=sinAcosB+sinBcosA


3. The attempt at a solution

sin(x)cos(pi/3)+sin(pi/3)cos(x)
0.5sinx + 0.8660cosx

I'm just not sure if i need to simplify it even further and hopefully I'm on the right track. Thanks
Phys.Org News Partner Science news on Phys.org
Scientists develop 'electronic nose' for rapid detection of C. diff infection
Why plants in the office make us more productive
Tesla Motors dealing as states play factory poker
rock.freak667
#2
Apr4-12, 08:49 PM
HW Helper
P: 6,202
That should be fine. I would just express 0.866 as √3/2 as that is an exact value whilst 0.866 is just an approximation.
cupcakes
#3
Apr4-12, 08:50 PM
P: 18
that seems right to me. However I'd keep sin(π/3) as [itex]\frac{\sqrt{3}}{2}[/itex].

Edit: I didn't see rock.freak667's reply.

menco
#4
Apr4-12, 10:59 PM
P: 45
Use standard identities to express

thanks for the response :)


Register to reply

Related Discussions
Standard conditions vs. Standard state Chemistry 1
Changing standard error to standard deviation. Set Theory, Logic, Probability, Statistics 1
Quadratic, standard and standard form of a curve Calculus 9
Express Trigonometric Identities of Terms of Variables Precalculus Mathematics Homework 2
Express Imaginary number in standard form. Calculus & Beyond Homework 11