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Prove that (cos theta-sintheta)/(cos the...

Prove that `(cos theta-sintheta)/(cos theta+sintheta)=sec 2 theta-tan 2theta`.

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To prove that \[ \frac{\cos \theta - \sin \theta}{\cos \theta + \sin \theta} = \sec 2\theta - \tan 2\theta, \] we will start with the left-hand side (LHS) and manipulate it to show that it equals the right-hand side (RHS). ...
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Prove that : (sintheta +sin2theta)/(1+costheta+cos2theta)=tantheta

Prove: (cos^2theta)/(sintheta)-cos e c\ theta+sintheta=0

Prove : (cos theta)/(1+sin theta) + (cos theta)/(1-sin theta)= 2 sec theta

Prove: (cos e c\ theta+sintheta)(cos e c\ theta-sintheta)=cot^2theta+cos^2theta

Prove that : (sin^(2)theta)/(cos theta)+cos theta=sec theta

Prove that (sin theta- "cosec" theta )(cos theta- sec theta )=(1)/(tan theta + cot theta).

Prove that, 1/(costheta-cos3theta)+1/(costheta-cos5theta)+1/(costheta-cos7theta)+…+to n terms = 1/(2sintheta) [cottheta-cot(n+1)theta]

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CENGAGE ENGLISH-TRIGONOMETRIC RATIOS AND TRANSFORMATION FORMULAS-Concept App. 3.4
  1. Prove that (1+sin2A)/(cos2A)=(cosA+sinA)/(cosA-sinA)=tan((pi)/(4)+A)

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  2. Prove that cot theta-tan theta=2cot 2 theta.

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  3. Prove that (cos theta-sintheta)/(cos theta+sintheta)=sec 2 theta-tan 2...

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  4. tan(pi/4+theta)-tan(pi/4-theta)=2tan2theta

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  5. Prove that cosec A -2 cot 2 A cos A = 2 sin A.

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  6. Prove that cos^(3)thetasin3theta+sin^(3)theta cos 3theta=(3)/(4)sin 4 ...

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  7. (sin^2 3A)/(sin^2A)-(cos^2 3A)/(cos^2A)=

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  8. Prove that (1+sec 2 theta)(1+sec 4 theta)(1+sec 8 theta)=(Tan 8theta)/...

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  9. If in an isosceles triangle with base 'a', vertical angle 20^@ and lat...

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  10. In DeltaABC, a = 3, b = 4 and c = 5, then value of sinA + sin2B + sin...

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  11. If cosA=3/4, then 32 sin (A/2) sin ((5A) /2)= ------------- ...

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  12. Find the value of (4cos^(2)9^(@)-1)(4cos^(2)27^(@)-1) (4cos^(2)81^(@...

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  13. If theta is an acute angle and sin((theta)/(2))=sqrt((x-1)/(2x)) ,then...

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  14. In a triangle ABC, if sin A sin(B-C)=sinC sin(A-B), then prove that co...

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  15. Let a=(pi)/(7), then show that sin^(2)3a-sin^(2)a=sin2asin3a.

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  16. Show that 1/(sin 10^@) - sqrt3/(cos 10^@) = 4

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  17. Prove that 2 sin^2 beta + 4 cos(alpha + beta) sin alpha sin beta + co...

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  18. If tan x=(a)/(b) and tan 2x=(b)/(a+b) find the smallest positive value...

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  19. tantheta+tan(6 0^0+theta)+tan(12 0^0+theta)=3tan3theta

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  20. If A=110^(@), then prove that (1+sqrt(1+tan^(2)2A))/(tan2A)=-tan A.

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