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Maximum value of 6 sin x cos x+4 cos 2 x...

Maximum value of `6 sin x cos x+4 cos 2 x`

A

6

B

4

C

5

D

10

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  3. Maximum value of 6 sin x cos x+4 cos 2 x

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  4. sin ^(6) theta+cos ^(6) theta+3 sin ^(2) theta . cos ^(2) theta=

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  6. If for real values of x, cos theta=x+(1)/(x), then

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  10. log tan 1^(circ)+log tan 2^(circ)+... .+log tan 89^(circ)=

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  11. The value of e^(log(10) tan 1^(o) +…. + log(10) tan 89^(o) is

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  12. cos ^(2) 5^(circ)+cos ^(2) 10^(circ)+cos ^(2) 15^(circ)+….+cos ^(2) 90...

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  13. The value of cot 5^(circ) . cot 10^(circ) .. . cot 85^(circ) is

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  14. cot 7 (1)/(2)^(circ)=

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  15. If x . tan 45^(circ) . cos 60^(circ)=sin 60^(circ) cot 60^(circ), then...

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  16. (sin 70^(@) + cos 40^(@))/(cos 70^(@) + sin 40^(@)) =

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  17. sin 47^(circ)+sin 61^(circ)-sin 11^(circ)-sin 25^(circ)=

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  18. sqrt(3) cot 20^(circ)-4 cos 20^(circ)=

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  19. For A=133^(circ), 2 cos (A/2)=

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