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If costheta=1/2(a+1/a)\ t h e n\ cos 3th...

If `costheta=1/2(a+1/a)\ t h e n\ cos 3theta` in term of `' a^(prime)=` a.`1/4(a^3 1/(a^3))` b. `4\ (a^3+1/(a^3))` c.`1/2(a^3(1/(a^3))` d. none

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ALLEN-TRIGONOMETRIC RATIOS AND IDENTITIES-All Questions
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  2. The expression 3[sin^4(3/2pi-alpha)+sin^4(3pi+alpha)]-2[sin^6(1/2pi+al...

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  3. If costheta=1/2(a+1/a)\ t h e n\ cos 3theta in term of ' a^(prime)= a...

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  4. The product cot123^0dotcot133^0dotcot137^0dotcot147^0, when simplified...

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  6. If alpha+beta+gamma=2pi, then tanalpha/2tanbeta/2+tangamma/2=tanalpha...

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  7. If A and C are two angles such that A+C=(3pi)/4 then (1+cotA)(1+cotC)=

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  12. (sin^3theta-cos^3theta)/(sintheta-costheta)-(costheta)/(sqrt(1+cot^2th...

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  17. If cos(A-B)=3/5 and tanA tanB=2, then a.cos A cosB=1/5 b. co...

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  18. If A+B=pi/3a n d\ cos A+cos B=1,\ t h e n- a.cos(A-B)=1//3 b. \ |cos ...

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  19. If A and B are acute positive angles satisfying the equations 3 sin^(2...

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