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cos alpha * sin (beta - gamma ) + cos be...

`cos alpha * sin (beta - gamma ) + cos beta * sin ( gamma - alpha ) + cos gamma * sin ( alpha - beta )= `

A

0

B

1

C

-1

D

`4 Cos alpha Cos beta Cos lambda`

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The correct Answer is:
A
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AAKASH SERIES-COMPOUND ANGLES-EXERCISE - II
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  4. If 2 tan A + cot A = tan B , then cot A +2 tan (A-B)=

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  7. In Dleta ABC if Tan B = (2Sin ASinC)/(Sin(A+C)) then TanA, TanB, TanC ...

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  8. In a triangle ABC, If cot A+ cotB +cot C=sqrt3, then show that the tri...

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  9. Tan A + Tan B + Tan C - (sin(A+B+C))/(cosAcosBcosC)=

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  10. Statement-I : If 0 lt alpha, beta lt pi/4, sin alpha =a/sqrt(1+a^(2)),...

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  11. I : If x cos theta = y cos (120^@ + theta ) = z cos ( theta + 240^(@)...

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  12. A =(cos 9^(@) - sin 9^(@))/(cos 9^(@) + sin 9^(@)) , B = (cos 21^(@) +...

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  13. Assertion (A) : If cos(x-y) = 3 cos (x + y) then cotx cotx = 2 Reaso...

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  14. Assertion (A) : tan (alpha - beta) + tan (beta - lambda) + tan (lambda...

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  16. cos alpha * sin (beta - gamma ) + cos beta * sin ( gamma - alpha ) + c...

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  17. If A = 35^(@), B = 15^(@), C = 40^(@), then tan A tan B +tan B tan C +...

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  18. In an acute angled triangle ABC, cot A cot B + cot C + cot c Cot A = …...

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  19. (Cos13-Sin13)/(Cos13+Sin13)+(1)/(Cot148^@)=

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  20. If (1+tan alpha)(1+tan 4alpha)=2, alpha epsilon(0,(pi)/(6)), then alph...

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