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If A+B=45^(@), find the valueof tanA+tan...

If `A+B=45^(@)`, find the valueof `tanA+tanB+tanA tanB`:

A

-1

B

44228

C

`sqrt3`

D

1

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The correct Answer is:
D
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QUANTUM CAT-TRIGONOMETRY-QUESTION BANK
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  2. For the every theta,0ltthetale90, find the values of the following ang...

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  3. If A+B=45^(@), find the valueof tanA+tanB+tanA tanB:

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  4. Find the value of sin75^@

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  5. solve the following expression cos32^@ cdot cos28^@-sin32^@ cdot sin28...

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  6. If cosA=(3)/(5) and sinB=(5)/(13), find the value of (tanA+tanB)/(1-t...

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  7. Find the value of sin^(2)(120^(@)-A)+sin^(2)A+sin^(2)(120^(@)+A):

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  8. If cos(alpha+beta)=(4)/(5) and sin(alpha-beta)=(5)/(13) and alpha, bet...

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  9. Find the maximum and minimum values of 8costheta+15sintheta:

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  10. Find the valueof 2cos45^(@).cos15^(@):

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  11. Find the value of (sin75^(@)+sin15^(@))/(cos75^(@)+cos15^(@)) :

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  12. Find the value of cos20^(@)+cos100^(@)+cos140^(@):

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  13. cos20^(@).cos40^(@).cos60^(@).cos80^(@) is :

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  14. What is the value of , (sin(90^@-theta)sec(180^@-theta)sin(-theta))/...

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  15. If sin(alpha+beta)=(4)/(5), sin(alpha-beta)=(5)/(13), find the value o...

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  16. Find the value of (cos2B-cos 2A)/(sin2A+sin2B):

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  17. (sinA+sin3A+sin5A+sin7A)/(cosA+cos3A+cos5A+cos7A) is :

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  18. If costheta=3/5, find the value of sin2theta :

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  19. find the value of expression (sin2x)/(1+cos2x) is:

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  20. find the value of the following expression cos^4theta-sin^4theta is :

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