NDA MATHEMATICS QUIZ - 16

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Question 1:

In a triangle 2cosAa+cosBb+2cosCc =abc+bac then the value of angle A is

Question 2:

In a triangle ABC , if (sb)(sc)=s(sa) then the angle A is equal to

Question 3:

In a triangle ABC, if C=90, then a2+b2a2b2sin(AB)=.

Question 4:

In a triangle ABC,  cos2Bb2cos2Cc2  =  . .  . .  . . . . 

Question 5:

In a triangle ABC b=4 and cosAa=cosBb=cosCc then area of triangle ABC is.

Question 6:

Area  of a triangle ABC is given by Δ=b2 (ca)2 then tanB2 is equal to

Question 7:

If ccos2A2+acos2C2=3b2 then a,b,c are in

Question 8:

In a triangle if (a+b+c)(a+bc)=λab then

Question 9:

In a triangle ABC,  cosB=sinA2sinC. then ABC is

Question 10:

If cosA+cosC=4sin2B2 then sides of the triangle are in