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If theta lies in the 1st quadrant and co...

If `theta` lies in the 1st quadrant and `costheta=8/(17)` then prove that `cos(pi/6+theta)+cos(pi/4-theta)+cos((2pi)/3-theta)=((sqrt(3)-1)/(2)+1/sqrt2) cdot(23)/17`.

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PATHFINDER-TRIGONOMETRIC RATIOS OF COMPOUND ANGLES-QUESTIONBANK
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  6. If tan(A+B)=x and tan(A-B)=y find the value of tan2A.

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  7. If log(b) n = 2 and og(n) 2b = 2, then find the value of b.

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  11. Prove that cos^2A+cos^2B-2cosAcosBcos(A+B)=sin^2(A+B).

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  12. Prove that tan8theta-tan6theta-tan2theta=tan8thetatan6thetatan2theta.

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  13. If tanA+tanB=a and cotA+cotB=b.Prove that cot(A+B)=1/a-1/b

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  14. If tanx+tan(x+pi/3)+tan(x+(2pi)/3)=3 then prove that (3tanx-tan^3x)/(1...

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  18. If theta lies in the 1st quadrant and costheta=8/(17) then prove that ...

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  19. If alpha, beta are the solutions of the equation a tantheta+b secthet...

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