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If tan 2theta . Tan 3 theta =1, then sin...

If `tan 2theta . Tan 3 theta =1`, then `sin5theta` =

A

0

B

1

C

`(1)/(sqrt2)`

D

none of these.

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UNITED BOOK HOUSE-Trigonometric Ratios of Complementry Angle-Exercise
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  3. If tan 2theta . Tan 3 theta =1, then sin5theta =

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  8. If tan A = cot B, then prove that A + B = 90°.

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  10. (2 tan 30^@)/(1 - tan^2 30^@) is equal to

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  11. If theta and (2theta - 45^@) are acute angles such that cosec theta co...

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  12. A, B and C are interior angles of a triangle ABC, then sin ((B + C)/(2...

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  14. If 5theta and 4theta are acute angles satisfying sin 5theta = cos 4the...

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  15. [sin^2 1^@ + sin^2 2^@ +sin^2 3^@ + ……………….. + sin^2 87^@ + sin^2 88^@...

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  16. (sin^2 1^@ + sin^2 3^@ + sin^2 5^@ + ………………… + sin^2 85^@ + sin^2 87^@...

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  17. The value of (cos(90^@ - theta)sec(90^@ - theta) tan theta)/(cosec(90^...

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  18. The value of (tan 47^@ + cot 27^@)/(tan 43^@ + cot 63^@) is

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  19. (1 + sec 20^@ + cot 70^@) (1 - cosec 20^@ + tan 70^@) equals

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