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2sin^2b+4cos(a+b)sina" " sinb+cos2(a+b)=...

`2sin^2b+4cos(a+b)sina" " sinb+cos2(a+b)=?`

A

cos 2a

B

cos 2b

C

sin 2a

D

sin 2b

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ADVANCED MATHS BY ABHINAY MATHS ENGLISH-MAINS MOCK TEST -QUESTION
  1. If (tanA)/(1-cotA)+(cotA)/(1-tanA)=K+tanA+cotA, then K = ?

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  2. If cosec θ – sin θ = l and sec θ – cos θ = m, then l2 m2 (l2 + m2 + 3...

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  3. If tanq-cotq=a and cos q+sinq =b , then (b^2-1)^(2)(a^2+4)=?

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  4. In an election between two candidates. 10% of voters did not cast thei...

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  5. In a DeltaABC , AB = 5, AC = 6cm, BC = 8 cm. Find the lengh of median ...

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  6. sqrt(4+sqrt(4-sqrt(4+sqrt(4-......oo))))=?

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  7. If x+1/(x)=4 and x^2+1/(x^3)=30 then x^3+1/x^2=?

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  8. The angles of elevation of the top of a tower form two points A and B...

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  9. In the following figure if BC = 12 cm. Then find the length of diagona...

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  10. The discount on a certain sum of money, due at the end of 2(1)/(4) ye...

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  11. The base of a right prism is a pentagon whose sides are in the raio 1:...

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  12. Find the total surface area of a right pyramid in which the base is an...

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  13. 25 men can complete a work in 10 days. 20 boys can complete this work ...

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  14. Three workers A, B and C working together completed a job in 10 days. ...

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  15. A pipe can fill a tank in 20 min and another pipe can fill a tank in 3...

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  16. If a^4+a^3+a^2+a= 0 then find the value of a^(1000)+ a^(100) + a^(10)

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  17. 2sin^2b+4cos(a+b)sina" " sinb+cos2(a+b)=?

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  18. A man can row 30 km upstream and 44 km downstream in 10 hrs . Also , h...

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  19. The equations of the sides of a triangle are x+y-5=0, x-y+1=0, and y-1...

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  20. A shipping clerk has to weigh 6 distinct packets. He weights them four...

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