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2(cos^(2) 73^(0) +cos^(2)47^(0)) - cos 1...

`2(cos^(2) 73^(0) +cos^(2)47^(0)) - cos 154^(0) = `

A

1

B

2

C

3

D

0

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The correct Answer is:
B
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AAKASH SERIES-COMPOUND ANGLES-EXERCISE - II
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  3. 2(cos^(2) 73^(0) +cos^(2)47^(0)) - cos 154^(0) =

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  4. If Tan40^(@) + 2 Tan 10^(@) = Cotx then x =

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  6. Tan (A-B) + Tan (B-C) + Tan (C-A)

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  7. If A+B+C=(pi)/2, " then " sum (cos (B+C))/(cos B cos C)=

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  8. If alpha + beta + lambda = (pi)/(2) and cot alpha, cot beta, cot lamb...

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  9. If Sin x Cosy = 1/4 and 3Tanx = 4 Tany then Sin (x - y) =

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  10. If Cot A Cot B = 2 & Cos (A+B) = 3/5 then Sin A Sin B

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  11. If cos (A-B)=3//5 and tan A tan B=2 , then which one of the following...

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  14. If (CosA)/(CosB)=nand(SinA)/(SinB)=m then (m^(2) - n^(2)) Sin^(2) B =

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  15. If tan A=(x sin B)/(1- x cos B) and tan B=(y sin A)/(1-y cos A) then ...

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  16. If tan beta =(n tan alpha )/(1+(1-n) tan^(2) alpha ), then tan(alpha-...

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  17. If sin (120^(@) - alpha) = sin (120^(@) - beta) and 0 lt alpha,beta lt...

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  18. If 2 tan A + cot A = tan B , then cot A +2 tan (A-B)=

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  19. In a Delta ABC , if the angle C is obtuse, then tan A ta B =

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  20. In a triangle ABC, fi Tan A + Tan B + Tan C = 6 and Tan A Tan B = 2 th...

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