B is θ and it has to be an exact value
B is θ and it has to be an exact value
Prove the identity
I need help solving the following equation: log(base3)(cos2x-tanx+8)=2 I'm wondering how to do it, I keep getting stuck after I substitute in for the double angle of cos and...
(cotx-1)/(cotx+1)=(1-tanx)/(1+tanx)
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?
I have not managed to establish how sin(x/2) relates to cos(x)
im not sure which identities to use and how to prove it.
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?