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of 0 < x < 90^@ and cosx=3/sqrt10 then t...

of `0 < x < 90^@` and `cosx=3/sqrt10` then the value of `log_10 sinx+log_10 cosx+log_10 tanx` is

A

2

B

3

C

4

D

none of these

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The correct Answer is:
C
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MOTION-TRIGNOMETRIC RATIOS & IDENTITIES -Exercise 2(Level -I)
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  3. If alpha in [(pi)/(2),pi] then the value of sqrt(1+ sin alpha)-sqrt(...

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  4. sqrt(2+sqrt(2+2cos 4 theta)), forall 0 lt theta lt pi//4 is

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  5. The value of tan (pi/16)+2tan(pi/8)+4 is equal to

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  6. If A=tan6^(@) tan 42^(@) and B= cot 66^(@)cot 78^(@) then-

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  7. The value of 64sqrt(3)sin(pi/48)cos(pi/48)cos(pi/24)cos(pi/12)cos(pi/6...

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  8. Let a and b be positive number not equal to 1 and (3pi)/(2) lt theta ...

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  9. f(theta)=sin^4theta+cos^2theta then range of f(theta)

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  10. The value of cos(pi/19)+cos((3pi)/19)+cos((5pi)/19)+......+cos((17pi)/...

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  11. Value of cos(pi/(2n+1))+cos((3pi)/(2n+1))+cos((5pi)/(2n+1))+... upto ...

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  12. A regular hexagon & a regular dodecagon are inscribed in the same circ...

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  13. in any triangle ABC, which is not right angled Sigma cosA.cosecB.cosec...

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  14. If 3 cos x + 2 cos 3x = cos y, 3 sin x + 2 sin 3x = sin y, then the va...

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  15. of 0 < x < 90^@ and cosx=3/sqrt10 then the value of log10 sinx+log10 c...

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  16. if tantheta=1/(2+(1/(2+1/(2+...oo)))) then find possible values of the...

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  18. If 2 cos x +sin x=1 then value of 7 cos x + 6 sin x lis equal to

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  19. Let f(x) denote the sum of the infinite trigonometric series f(x)=unde...

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  20. If tan A & tan B are the roots of the quadratic equation x^2 - ax +...

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