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Show that cot.(pi)/(20). cot .(3pi)/(2...

Show that
`cot.(pi)/(20). cot .(3pi)/(20). cot.(5pi)/(20). cot .(7pi)/(20). cot.(9pi)/(20)=1`

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cot. (pi)/(20) cot. (3pi)/(20) cot. (5pi)/(20) cot. (7pi)/(20) cot. (9pi)/(20) cot. (15pi)/(20)=

S.T cot.(pi)/(16).cot.(2pi)/(16).cot.(3pi)/(16).....cot.(7pi)/(16)=1

cot((pi)/4-2cot^(-1)3)=

cot (- (15pi)/(4))

The value of "cot"(7pi)/(16)+"2 cot"(3pi)/(8)+"cot"(15pi)/(16) is

The value of cot(7pi)/16 + 2 cot(3pi)/8 + cot(15pi)/16 is:

The value of cot(7pi)/16 + 2cot(3pi)/8 + cot(15pi)/16 is:

cos ((5pi)/(4)) - sin ((5pi)/(4)) + tan((11pi)/(4)) - cot((11pi)/(4))=

The value of "cot" (7 pi)/(16) + "2 cot" (3pi)/(8) + "cot" (15 pi)/(16) is

cos ((3pi )/( 2 ) + x) cos (2pi + x) [cot ((3pi)/( 2)- x ) + cot (2pi +x) ]=1

SRISIRI PUBLICATION-IPE SCANNER (TEXUAL BITS)-Very Short Questions (2 marks) (Trigonometric Ratios, Transformations)
  1. Find a sine function whose period is 2//3.

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  2. Find the maximum and minimum value of f(x) = 5sinx + 12cos x -13.

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  3. Show that cot.(pi)/(20). cot .(3pi)/(20). cot.(5pi)/(20). cot .(7pi)...

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  4. Find the value of sin^(2)""(pi)/(10)+sin^(2)""(4pi)/(10)+sin^(2)""(6pi...

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  5. Show that cos^(2)""(pi)/(10)+cos^(2)""(4pi)/(10)+cos^(2)""(6pi)/10+cos...

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  6. Evaluate cos^(2)45^(@)+cos^(2)135^(@)+cos^(2)225^(@)+cos^(2)315^(@).

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  7. If tan20^(@) = lambda then show that (tan 160^(@) -tan 110^(@))/(1+tan...

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  8. If tan20^(@)=p then prove that = (tan610^(@)+tan700^(@))/(tan 560^(@)-...

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  9. If "sec" theta + tan theta = 2//3, then find the value of sin theta an...

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  10. If "sec" theta + tan theta = 5 then find sin theta and determine the q...

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  11. If cosec theta + cot theta =1//3, then find cos theta and determine th...

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  12. If acos theta -bsin theta =c, then show that asine theta + bcos =pm s...

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  13. If 3sin A + 5 cos A = 5, then show that 5 sin A - 3 cos A = +- 3.

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  14. If 3sin A + 4 cos A = 5, then find the value of 4 sin theta - 3 cos th...

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  15. Show that sin 1140^(@) cos 390^(@)-cos 780^(@) sin 750^(@) = 1//2.

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  16. Find the value of sin 330^(@) .cos 120^(@) + cos 210^(@) . Sin 300^(@)...

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  17. Simplify cos 100^(@) cos 40^(@) + sin 100^(@) sin 40^(@).

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  18. Show that sin 750 ^(@) cos 480^(@) + cos 120 ^(@) cos 60 ^(@)=-1/2

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  19. Prove that sin 780^(@) sin 480^(@)+cos240^(@). Cos300^(@) = 1/2

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  20. Find the value of tan56^(@)-tan11^(@)-tan56^(@).tan11^(@).

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