Proving Identities - Page 4
Questions
- If #tan (A-B) /tanA +sin^2C /sin^2A=1 #, prove that #tanA tanB =tan^2 C# ?
- How to prove the following? #cot^(-1)7+cot^(-1)8+cot^(-1)18=cot^(-1)3#
- If 4sin^2x=1,find the value of 2+3cos^2x/1-2sin^2x?
- Cos (pi + x) + cos (pi-x) ?
- How do you prove #(1 - tanx) / (1 + tanx) = (1 - sin2x) / (cos2x)#?
- How do you verify this? sin(x) cos(x) [tan(x) + cot(x)] = 1 Thank you!!
- How do you verify #Sin[(3pi/2)+theta]= -cos(theta)#?
- Proof cos(x+y) cos(x-y)= cos2x + cos2y - 1 ?
- How do i establish the identity? I am not that great a trig. sinA cscA - sin^2A = cos^2A
- How do you verify the identity: #sin2x=(tanx)(1+cos2x)#?
- How do you verify the identity #secx-cos^2xcscx=tanxsecx#?
- How can this be reduced to the simplest form?
- How do you prove #\frac { 1- \tan ^ { 2} \theta } { 1+ \tan ^ { 2} \theta } \equiv \cos 2\theta#?
- How do you find A, B and C, given that #A sin ( B x + C ) = cos ( cos^(-1) sin x + sin^(-1) cos x ) + sin (cos^(-1) sin x + sin^(-1) cos x )#?
- Prove that #(sin 3 x + sin x) sin x + (cos 3x - cos x) cos x = 0# ?
- How do you prove #tan^2(1/2theta)=(tantheta-sintheta)/(tantheta+sintheta)#?
- How do you verify #sec^2 x - cot^2 ( pi/2-x) =1#?
- How do you verify the identity #sin(pi/2 + x) = cosx#?
- How can you prove that #1 - tanh^2x = sech^2x#?
- How do you prove (tanx-cotx)/(sinxcosx)=sec^2(x)-csc^2(x)?