66 Answered Questions for the topic Identities

11/18/15

Prove v(3cosx+4sinx)2+(4cosx-3sinx)2 = 5
Proving Basic Problems: I have to prove that one side equals the other using identities.   √(3cosx+4sinx)2+(4cosx-3sinx)2 = 5   Please show the steps or even try to explain the process to me! :)
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11/11/15

Evalulate Basic Problems
My professor said for this problem to use inverse trig functions, half angle, and double angle identities.   Evaluate:   tan(2sin-1(4/5))   Please list the answer step by step and next to... more
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11/11/15

Prove Basic Problems (Dealing with Cos & Tan)
Prove:   1-cos2x/1+cos2x=tan2x   Please include step by step and next to each step, please include the identity used! :)
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11/11/15

Prove Basic Problems (Dealing with Sin, Cos, Tan)
Prove:   SQUARE ROOT OF (3cosx+4sinx)2+(4cosx-3sinx)2 = 5   Please include step by step and the identities used next to each step! :)
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11/11/15

Proving Basic Problems (Dealing with Sin, Cos, Tan)
Prove:   sinx/sinx+cosx)=tanx/1+tanx   If you could, please list the steps and include the identities next to the steps.
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02/05/15

2sin^4(x) + sin^2(x)cos^2(x) - cos^4(x) = 3sin^2(x)
Could you please make one side equal the other?
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01/03/15

Find all values of theta in the interval from 0 to 360 that satisfy the equation 2sin squared theta plus sin theta=1
Find all values of Θ that satisfy in the interval 0≤Θ≤360 that satisfy the equation 2sin2Θ+sinΘ = 1     Having trouble with this homework problem, and my notes don't help. Thank you!
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Identities

10/25/14

verify 2cos^2?-sin^2?+1÷cos?=3cos?
Steps On How To Verify The Identity 
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Identities Trigonometry

04/18/14

tan(pie/2-x) cot x / csc^2(-x)-1
use the fundamental identities to simplify the expression
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Identities

03/30/14

tan^2x - tanx/ tan^2x + tanx = tan2x - sec 2x
Hi plz could u help me with this Q. How can prove RHS=LHS
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Identities

03/28/14

Double angle identities help
5 Sin 2x - 6 sin x = 0   Sin 2x = cos x   Cos 2x + 5 = 4 sin x
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02/09/14

verify the identity (cosx-cscx)(cosx+1)=-sinx
i need this for my test tomorrow and my teacher isnt asnwering my emails
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12/12/13

Verify the identity 1/tan(theta)csc(theta) = cos(theta)
This is for my trig class, and the directions say to verify the identity. Thanks so much.
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12/12/13

Verify the identity cos^3xsin^2x = (sin^2x-sin^4x)cosx
This is for my trig class, and the directions say to verify the identity. Thanks so much.
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12/12/13

Verify the identity tanx+coty/tanxcoty = tany+cotx
This is for my trig class, and the directions say to verify the identity. Thanks for the help!
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12/12/13

Simplify 1/cscx+1 - 1/cscx-1
This is for my trig class, and the directions say use the fundamental trigonometric identities to simplify the expression. Thanks for the help!
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