Posted by gopi on Friday, December 28, 2012 at 4:09am.
x = pi/4, so cos2x = 0
since y ≠ pi/2, sin2y ≠ 0
I suspect a typo somewhere
Related Questions
advanced functions - Show that tanx = sinx / cosx can be written as tan(x+y...
adv functions - Show that tanx= (sinx/ cosx) can be written as: tan(x-y) = (tanx...
Precal - show that: (1-tanx)/(1+tanx)= (1-sinx)/(cos2x)
Math trignometry - how can you condense these cos^3x* cos2x^2 cos^3x+ cos2x^2 ...
Trig - If tanx = 2/3 tany = 1/2 then tan(x-y) = ?? a.7/4 b.7/6 c.1/8 d.8/6 which...
Trigonometry - Given that a^2+b^2=2 and that (a/b)= tan(45degee+x), find a and b...
Trigo - Given that a^2+b^2=2 and that (a/b)= tan(45degee+x), find a and b in ...
trignometry - how to find derivative of (2+cotx)/(7-tanx)
math - Prove the identity: 1-cos2x/sin2x = 1+tanx/1+cotx I simplified the RS to ...
trig - suppose sin(x)=4/5 and cos(y)=-12/13, and x and y are in the second ...
For Further Reading
