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If Sin^(2) theta + 3 Cos theta -2 =0 the...

If `Sin^(2) theta + 3 Cos theta -2 =0` then `Cos^(3) theta + Sec^(3) theta =`

A

9

B

16

C

18

D

1

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-TRIGONOMERTIC RATIOS-PRACTICE EXERCISE
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  4. If cos^(2) x + cos^(4) x =1 then tan^(2) x + tan^(4) x=

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  10. If sec^(6) theta - tan^(6) theta = a sec^(4) theta + b sec^(2) theta +...

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  11. If x=r cos alpha cos beta cos gamma , y= cos alpha cos beta sin gamma...

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  12. If x= cot theta + cos theta , y= cot theta - cos theta , " then " (x^...

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  13. If tan theta + sin theta = m, tan theta - sin theta = n " then " (m^(...

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  14. If x= a cos^(2) theta sin theta and y= a sin^(2) theta cos theta , "...

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  17. If alpha = pi/19 then (sin 3 alpha - sin 23 alpha)/(sin 4 alpha + sin ...

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  18. The equation cosec theta = (x^(2)+y^(2))/(2 xy) is (x != 0, y != 0)

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  19. In Delta ABC,right angled at C, then tanA + tanB =

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  20. If Sin theta = ((a-4)/(2)) then

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