(cotx-1)/(cotx+1)=(1-tanx)/(1+tanx)
(cotx-1)/(cotx+1)=(1-tanx)/(1+tanx)
Prove the identity
prove the identity
prove the identity
In trying to find the value of sin 165 degrees, I get the answer (sq rt (2 - sq rt 3))/2 using 1/2 angle equality -- 30 degrees / 2 -- and (sq rt 6 - sq rt 2)/4 using 180 deg - 15 deg. Calculator...
I'm having trouble proving these trig identities. Help is greatly appreciated. Thanks in advance! 1) 1- sinx/cosx = cosx/ 1+sinx 2) sin^2x = 1- cos^2x 3) sin2x/2sinx = cosx 4)...
Cos4x= 1/8 (3 + 4cos2x +cos4x)
Sin(-pi/12) Is this the same as finding sin( pi/12)
A) cos 2t B) sin 2t C)cos (t/2) D)sin (t/2) Cos t =3/5, where 0 < t < pi/2 Sin t = -3/5,where pi < t < 3pi/2
solve with only trig identities, no calc
no calc just trig identities please show work! thakns so much for any help!
if the problem had cos^2 (2x) would you first put in the double angle or power reduction?
im not sure which identities to use and how to prove it.
I have not managed to establish how sin(x/2) relates to cos(x)
This is for my trig class. Thanks for the help!
This is for my trig class. Thanks for the help!
i've done problems like this before, but i was always able to change a term to cancel out something
How can you prove this?