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about to only mathematics

A

positive

B

zero

C

negative

D

-3

Text Solution

Verified by Experts

The correct Answer is:
C
For `alpha=-pi//2,beta=pi//2andgamma=2pi`
`sinalpha+sinbeta=singamma=-2`
Hence, the minimum value of the expression is negative.
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  14. Range of f(theta)=cos^2theta(cos^2theta+1)+2sin^2theta is [3/4,1] (b)...

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  15. If 0<theta<pi, then minimum value of 3sintheta+cos e c^3theta is 4 (b)...

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  16. If thetaigt0" for "1lethetalenandtheta1+theta2+theta3+...+thetan=pithe...

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  17. The set of values of lambda in R such that sin^2theta+costheta=lambda...

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  18. Let A=sin^8theta+cos^14theta, " then "A("max") is

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