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Find the least value of the expression `3sin^(2)x+4 cos^(2)x`.

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VK JAISWAL-COMPOUND ANGLES-Exercise-5 : Subjective Type Problems
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  7. The minimum value of (sintheta+c o s e ctheta)^2+(costheta+sectheta)^...

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  9. If K^(@) lies between 360^(@) and 540^(@) and K^(@) satisfies the equa...

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  10. If cos20^(@)+2sin^(2)55^(@)=1+sqrt(2)sinK^(@), K in (0, 90)," then "K=

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  11. If the value of cos((2pi)/7) + cos((4pi)/7)+cos((6pi)/7)+cos((7pi/7))=...

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  12. Let alpha be the smallest integral value of x, x>0 such that tan 19x=(...

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  15. If cosA=(3)/(4) and k sin ((A)/(2))sin((5A)/(2))=(11)/(8). Find k.

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  16. Find the least value of the expression 3sin^(2)x+4 cos^(2)x.

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  18. The value of cos24^0/(2tan33^0sin^2(57^0))+sin162^0/(sin18^0-cos18^0ta...

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  19. Find the value of tantheta(1+sec2theta)(1+sec4theta)(1+sec8theta), whe...

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