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In a DeltaPQR , if 3 sin P+4 cos Q=6 and...

In a `DeltaPQR` , if 3 sin P+4 cos Q=6 and 4 sin Q+3 cos P=1 , then the angle R is equal to

A

`(5pi)/(6)`

B

`(pi)/(6)`

C

`(pi)/(4)`

D

`(3pi)/(4)`

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-COMPOUND ANGLES-LECTURE SHEET (EXERCISE - I)
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  7. IF alpha+beta=pi/2 and gamma+beta=alpha then find tan alpha.

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  8. If (sin x)/(sin y)=(1)/(2), (cos x)/(cos y)=(3)/(2), where x,y in (0,(...

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  9. If tan x + tan 2x+tan 3x=tan x tan 2x tan 3x then |sin 3x+cos 3x|

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  10. If theta is eliminated from the equations x=a cos(theta-alpha) and y=b...

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  11. Let x=sin1^(@), then the value of the expression (1)/(cos 0^(@).cos 1^...

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  13. (sqrt(2)-sin alpha - cos alpha)/(sin alpha - cos alpha) is equal to

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  14. If U(n) = sin n theta.sec^(n)theta, V(n)=cosnthetasec^(n)theta for n=0...

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  15. Find the value of the expression sqrt3 cosec 20^@-sec20^@=…….

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  16. If A and B are acute positive angles satisfying the equations 3sin^(2)...

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  17. If theta=3alpha and sin theta =(a)/(sqrt(a^(2)+beta^(2))),, the value ...

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  18. If sqrt(2)cos A = cos B + cos^(3)B, and sqrt(2)sin A = sin B- sin^(3)B...

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  19. If sin theta(1)sin theta(2)-cos theta(1)cos theta(2)+1=0, then the val...

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  20. Given both theta and phi are acute angles and sin theta = (1)/(2), cos...

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