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If cos 2 B=(cos (A+C))/(cos (A-C)), then...

If `cos 2 B=(cos (A+C))/(cos (A-C)),` then `tan A, tan B`, `tan C` are in

A

A.P

B

G.P

C

H.P

D

none of these

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HIMALAYA PUBLICATION-MEASUREMENT OF ANGLES, TRIGONOMETRIC RATIOS AND RELATION BETWEEN SIDES AND ANGLES OF A TRIANGLE-QUESTION BANK
  1. If sin 2 theta=cos 3 theta and theta is an acute angle then sin theta=

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  2. The value of (sin^(2) 3 A)/(sin^(2) A) - (cos^(2) 3 A)/(cos^(2) A) is ...

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  3. If cos 2 B=(cos (A+C))/(cos (A-C)), then tan A, tan B, tan C are in

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  4. If cos theta=(2 cos phi-1)/(2-cos phi), then tan (theta)/(2)=

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  5. (3 cos phi+cos 3 phi)/(3 sin phi-sin 3 phi)=

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  6. If sin 2 x=n sin 2 y then the value of (tan (x+y))/(tan (x-y))=

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  7. If tan x=(b)/(a) then sqrt((a+b)/(a-b))+sqrt((a-b)/(a+b))=

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  8. If tan(picos theta) = cot(pisin theta), then cos(theta - pi/4) is :

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  9. If tan (pi cos theta)=cot (pi sin theta), 0ltthetalt(3 pi)/(4) then, s...

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  10. If 0 lt x lt (pi)/(4) then sec 2 x-tan 2 x=

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  11. If tan A+cot A=4 then tan ^(4) A+cot ^(4) A=

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  12. The value of 4 sin A cos ^(3) A-4 cos A sin ^(3)A

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  13. Maximum value of 6 sin x cos x+4 cos 2 x

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  14. sin ^(6) theta+cos ^(6) theta+3 sin ^(2) theta . cos ^(2) theta=

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  15. If 1+sin x+sin ^(2) x+….. to infty=4+2root 3 , 0 lt x lt pi then x=

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  16. If for real values of x, cos theta=x+(1)/(x), then

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  17. If sin theta(1)+sin theta(2)+sin theta(3)=3 then cos theta(1)+cos thet...

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  18. If sec x=P and cosec x=Q then

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  19. If tan theta+sec theta=sqrt(3), 0 lt theta lt pi then theta=

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