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If a, b and A are given and `c_(1) , c_(3)` are two values of the side c in the ambiguous case, then `c_(1)^(2) + c_(2)^(2) - 2c_(1)c_(2) * cos 2 A` =

A

`4a^(2) cos^(2)A`

B

`4a^(2)sin^(2)A`

C

`4a^(2)`

D

`4a^(2) cos^(2)2A`

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AAKASH SERIES-PROPERTIES OF TRIANGLES-LECTURE SHEET EXERCISE - IV (Straight Objective Type Question)
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  2. In Delta^("le") ABC , if a,b and A are given then there are two triang...

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  3. In Delta^("le") ABC , if a , b and A are given then there are two tri...

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  4. In Delta^("le") ABC, if a,b and A are given then there are two triangl...

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  5. If a, b and A are given and c(1) , c(3) are two values of the side c ...

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  6. In DABC, a, b, A are given and c(1), c(2) are two values of the third...

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  7. Two adjacent sides of cyclic quadrilateral are 2 and 5 and angle betwe...

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  8. E is a point on the side AD of a rectangle ABCD, so that DE = 6, DA = ...

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  9. Let ABCD be a quadrilateral with area 18. with side AB parallel to the...

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  10. If length of the sides of a triangle ABC are 4 cm, 5 cm and 6 cm, O is...

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  11. PQ is the perpendicular bisector of AD.AB bot^("lar") BC " and " DC bo...

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  12. In Delta^("le") ABC, AB = 7, AC = 9 " on " bar(AB), point D is t aken ...

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  13. ABC is a right angled triangle with AB = 4, BC = 3, AC = 5. P is mid p...

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  14. Through the centroid of an equilateral triangle, A line parallel to th...

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  15. A square whose side is 2 cm has its corners cut away so as to form a r...

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  16. In a triangle ABC bisector of lfloor C meets the side AB at D and circ...

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  17. In DeltaABC. on the side BC, D and E are two points such that BD=DE=EC...

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  18. Statement 1: If I inentire of DeltaABC andl(1) excenter opposite to A ...

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  19. In a triangle ABC, the median to the side BC is of length 1/sqrt(11 - ...

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  20. In a triangle of base a, the ratio of the other two sides is r (rlt1)....

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