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Syllabus

(a) 4 (b) 2sin2 alpha

(c) -4sin2 alpha (d) 4sin2 alpha

In Traiangle ABC if b^{2}+c^{2}=3a^{2}. Then cotB+cotC-cotA equals to1. 1

2. ab/4 delta

3. 0

4. ac/4 delta

Ans and explanation

(a) sinA (b) tanA (c) sin

A(d) cosA(e) tanA2 2 2

ABCD is a trapezium such that AB and CD are parallel and BC⊥CD. If ∠ADB = θ, BC = p and CD = q, then AB is equal to :

OptionsA)

B)

C)

D)

(a) b cot A (b) c cot A

(c) a cot A (d) a cot B

a) There is a regular polygon with r/R=1/2,

b) There is regular polygon with r/R=1/rt2,

c) There is regular polygon with r/R=2/3,

d) There is regular polygon with r/R=rt3/2.

Solve this :$59.Themostgeneralsolutionoftheequation\phantom{\rule{0ex}{0ex}}8{\mathrm{tan}}^{2}\frac{\theta}{2}=1+sec\theta ,is\phantom{\rule{0ex}{0ex}}\left(a\right)\theta =2n\mathrm{\pi}\pm {\mathrm{cos}}^{-1}\left(\frac{1}{3}\right)\left(\mathrm{b}\right)\mathrm{\theta}=2\mathrm{n}\mathrm{\pi}\pm \frac{\mathrm{\pi}}{6}\phantom{\rule{0ex}{0ex}}\left(\mathrm{c}\right)\mathrm{\theta}=2\mathrm{n}\mathrm{\pi}\pm {\mathrm{cos}}^{-1}\left(\frac{-1}{3}\right)\left(\mathrm{d}\right)\mathrm{None}\mathrm{of}\mathrm{these}$

^{2}+4xy+y^{2}=0 is perpendicular to Lx+y+4=0 then L=?In ΔABC,andattains its maximum possible, then the equation whose are rootsandis

OptionsA)

B)

C)

D)

a cosA + b cosB + c cosC = r/R a + b + c

plzzzansfast

s. Then, the maximum area of the triangle isif abc is a triangle having a right angle at C and AE, BD are drawn perpendicularly to AB meet BC and AC produced in E and D respectively then prove that tan CED =tan^3 bac

A)

B)

C)

D)

None of these

Let the angles A, B and C of ΔABC be in A.P and.

Find the measure of angle C.

30°

45°

60°

90°

LetPQRbe a triangle of areawithand, wherea,bandcare the lengths of the sides of the triangle opposite to the angles atP,QandRrespectively. Thenequals

In ΔABC,andattains its maximum possible, then the equation whose are rootsandis

OptionsA)

B)

C)

D)

In ΔABC,andattains its maximum possible, then the equation whose are rootsandis