trig
posted by MIK .
what's the single trig. function of cos6xcosxsin6xsinx

trig 
Reiny
recall
cosAcosB  sinAsinB = cos(A+B)
then
cos6xcosx  sin6xsinx = cos(6x+x) = cos(7x)
Respond to this Question
Similar Questions

trig
What kind of reflection does the trig function y = cos(4x/3 minus 1) have? 
trig
What kind of reflection does the trig function y = cos(4x/3 minus 1) have? 
Trig
How do you express these problems as single trigonometric function values or as single numbers, using identities? 
Trig
How do you express these problems as single trigonometric function values or as single numbers, using identities? 
trig
simplify to a constant or basic trig function.. 1+tan(x)/1+cot(x) 
trig 26
simplify to a constant or trig func. 1. sec ²utan ²u/cos ²v+sin ²v change expression to only sines and cosines. then to a basic trig function. 2. sin(theta)  tan(theta)*cos(theta)+ cos(pi/2  theta) 3. (sec y  tan y)(sec y + … 
Trig
Find (if possible) the trig function of the quadrant angle. sec 3pi/2 
Precalculus
How would you solve this trig function: cos2x=sin^22 how do you know what trig identities to use? 
trig
how to graph thr trig function f(x)3x180)+2 and the parent function? 
calculus
1. what trig function has an amplitue of 1 and negative values for angles between π/2 and π?