SOLUTION: Please help me solve these Trigonometric Addition Formulas:
cos2xcos3x+sin2xsin3x
sin5xcosx-cos5xsinx
Algebra.Com
Question 673994: Please help me solve these Trigonometric Addition Formulas:
cos2xcos3x+sin2xsin3x
sin5xcosx-cos5xsinx
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
cos2xcos3x+sin2xsin3x
Identity: cos(s-t)=cos s cos t+sins sin t
cos2xcos3x+sin2xsin3x
=cos(2x-3x)
=cos(-x)
=cosx (cos is an even function)
..
sin5xcosx-cos5xsinx
Identity: sin(s-t)=sin s cos t-cos s sin t
sin5xcosx-cos5xsinx
=sin(5x-x)
=sin (4x)
RELATED QUESTIONS
Please help me solve these equations by the addition method.
Thank you.
3x - 2.5y (answered by tyettatt@yahoo.com)
Please help me answer this problem. Use half anglel formulas to find the exact value of... (answered by lwsshak3)
please help me solve these two problems 12(6x+2)=-6(8x-8)
solve using the addition &... (answered by richwmiller)
Please help me understand how to solve these equations by the addition method.
Many... (answered by Fombitz,ankor@dixie-net.com,MarionR55)
Please help me understand how to solve these equations by the addition method.
Many... (answered by Fombitz)
please help me solve this trigonometric equation: sec(theta) = tan(theta) +... (answered by stanbon,Alan3354)
can you please help me solve this trigonometric equation:... (answered by lwsshak3)
Please help me solve this trigonometric equation: {{{ csc^2(x)-cot(x)-3= 0... (answered by mananth)
Express as a trigonometric function of one angle.
cos 8 sin(−1) − cos 1 sin 8
Not (answered by ikleyn)