Answers created by Abhishek K.

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• Cos^2A+cos^2B-sin^2C=-2cosA.cosB.sinC?
  
• Can you prove that?
  
• How do you verify the identity: `(secx + cscx )/( sinx + cosx) = cotx + tanx`?
  
• How to prove the trigonometric identity?
  
• How to prove?
  
• If `8sintheta=4+costheta`, what is the value of `tantheta` ?
  
• If `tantheta + sectheta = x`, show that `sintheta=(x^2-1)/(x^2+1)` ?
  
• How to prove `sin^2(-pi/8)=sin^2((7pi)/8)` ?
  
• How to prove `cos^2(pi/8)+cos^2 ((3pi)/8)+cos^2((5pi)/8)+cos^2((7pi)/8)=2` ?
  
• Cos(4theta)sin(2theta)+sin(3theta)cos(theta)=sin(5theta)cos(theta)?
  
• Who's interested in a new Socratic on a different website?
  
• Please solve q 38 ?
  
• 4arcsinx + arccosx =pi then x=??
  
• Carbon dioxide reacts with carbon to form carbon monoxide. This is an example of?
  
• If (1/x + x) = 8, What will be the value of (x^3 + 1/x^3)?
  
• What is the solution? `(x+5)/5=1-((x+5)/7)`
  
• How do you solve `sqrt(x - 3) + sqrt(x + 5) = 4`?
  
• Prove that ? Sec^2 x + cosec^2 x = sec^2 x . cosec^2 x
  
• Prove it -- tan Ø + 2 tan 2 ø + 4 tan 4 ø + 8 cot 8 ø = cot ø ?
  
• How do you find `tan(1/2sin^-1(1/2))`?
  
• What is the length of ST?
  
• How to factorise `(x+5)(x+9)(x+3)(x+7)-33`?
  
• How to prove: `sin^6theta-cos^6theta=(2sin^2theta-1)(cos^2theta+sin^4theta)` ?
  
• How to prove `(costheta+cosbeta)/(sintheta-sinbeta)=(sintheta+sinbeta)/(costheta-cosbeta` ?
  
• `(1+cotx)=(2cos2x)/(sin2x-2sin^2x)` prove?
  
• If A+B=225°, then find the value of `(cot A/(1+cot A))(cot B/(1+cot B))`?
  
• Find the value of tan 203°+tan 22°+tan 203° tan 22°?
  
• Prove the trigonometric identity ?
  
• Prove that Sin 10 degree sin 30 degree sin 50 degree sin 70 degree = 1/16?
  
• What is the internal angle sum of a hexagon?
  
• Help with this question, keep getting it wrong - (3x+4)² - (x+7)(x-6) ?
  
• This is the question ?
  
• How do you prove the following?
  
• If, `Cosx+Cosy=a` and `Sinx+Siny=b` So Prove That ?? `Sin2x+Sin2y = 2ab{1-(2/(a^2+b^2))}`
  
• Factorise the following by using suitable identities?
  
• How do you solve `17-20q=(-13-5q)4`?
  
• Solve for x where pi <= x <= 2pi ? Tan^2 x + 2 sqrt(3) tan x + 3 = 0
  
• If, θ=2π/7 So Prove That? Secθ+Sec2θ+Sec4θ = -4
  
• Prove that Sin(pi/4 + x) + sin (pi/4 - x) = root 2 cos x ?
  
• S is a geometric sequence? a)Given that (`sqrtx`-1), 1 and (`sqrtx`+1) are the 1st 3 terms of S, find the value of `x`. b)Show that the 5th term of S is 7+5`sqrt2`
  
• Factor each polynomial?
  
• How do you solve `sin(2x)cos(x)=sin(x)`?
  
• How do you prove that `cos2x+cosx=(cosx+1)(2cosx-1)`?
  
• How do you solve `sin(x) - cos(x) -tan(x)= -1`?
  
• Please solve q 56 ?
  
• Please solve q 101?
  
• Sec thita -1÷ sec thita +1 =(sin thita ÷ 1+ costhita)^2 ?
  
• How To Prove ? TanA(1+Sec2A)=Tan2A
  
• Express cos4x as powers of cosx. ?
  
• How do you calculate `sin(cos^-1(5/13)+tan^-1(3/4))`?
  
• How do you solve `tan 4x = tan 2x`?
  
• Prove It ?? Sin10°Sin50°+Sin50°Sin250°+Sin250°Sin10°=0
  
• The area of a parallelogram is 588cm^2. If the height is 12 cm, what is the base?
  
• Please solve q 80 ?
  
• Prove that ? Cos10°cos20°+Sin45°Cos145°+Sin55°Cos245° = 0
  
• `cos⁻¹(sqrtcos α)−tan⁻¹(sqrtcos α)=x` ,then what is the value of sin x ?
  
• Expand the Trigonometric Expression -sec²(π/4 - x )?
  
• Let f(x) = 3x + 8 and g(x) = x^2 + 5, find (f g)(x) ?
  
• A circle's center is at `(2 ,7 )` and it passes through `(6 ,4 )`. What is the length of an arc covering `(5pi ) /3` radians on the circle?
  
• How your verify `1/8[3+4cos2x+cos4x]=cos^ 4x`?
  
• If tan alpha=x+1 & tan bita=x-1 Then find what is 2cot(alpha-bita)=?
  
• `cosx+sinx=sqrt(cosx)`?
  
• Please solve q 95 ?
  
• Please solve q 64 ?
  
• Show that `(8x^2)^(8-r)(1/(2x))^r=2^(24-4r)(x^(16-3r))`?
  
• Prove that ??`(Sinx+Sin2x+Sin3x)/(cosx+cos2x+cos3x) = tan2x`
  
• Show prove the below identity? `1/cos290 + 1/(sqrt3sin250) = 4/sqrt3`
  
• How to find the general solution 5 sin(x)+2 cos(x)=3?
  
• Find the exact value? `2sinxcosx+sinx-2cosx=1`
  
• Find the exact value? `3-2sin^2x=3cosx`
  
• How do you solve `tan 4x = tan 2x`?
  
• How do you simplify `sqrt(x-1) + sqrt( 2x) = 3`?
  
• How do you prove `(tanx+sinx)/(2tanx)=cos^2(x/2)`?
  
• How do you find the x and y intercepts for `y=3x-5`?
  
• How do you write an equation of a line passing through (-3, 4), perpendicular to `3y=x-2`?
  
• Can anybody help me? (3^-2 * b^2) / (a^0 * b^2)
  
• If 2tan^-1x=sin^-1K. What will be the value of k?
  
• Prove that `32sin^4x.cos^2x=cos6x-2cos4x-cos 2x+2`?
  
• Please evaluate q 22?
  
• `sin` of what is equal to `sqrt3/2`?
  
• Please solve q18 ?
  
• Please solve q 14 ?
  
• Please solve q 18?
  
• Please solve q 11?
  
• How do I prove that 5 - 5cos^2 x = 5sin^2 x?
  
• Write tan700 as the trigonometric function of an acute angle ?
  
• How do you prove that `sqrt(3)cos(x+pi/6) - cos(x+pi/3) = cos(x)-sqrt3sinx` ?
  
• How do you write the equation in slope intercept form given point (−1, 6) and has a slope of −3?
  
• Find the value of sin (a+b) if tan a=4/3 and cot b= 5/12, 0^degrees<a<90^degrees and 0^degrees<b<90^degrees ?
  
• Prove that `cosec(x/4)+cosec (x/2)+cosecx=cot(x/8)-cotx` ?
  
• What is `sin((7pi)/4)`?
  
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