" If "A=320^(@)" than "2sin(A)/(2)=

If A+B+C= 180^(@) , " then " ( sin 2A- sin 2B- sin 2C)/(sin 2B- sin 2A - sin 2C)=

Value of 2sin^(2)a+2sin^(2)b+(2sin a)(2sin b)cos(a+b) is-

The value of sin^(2) 1^(@) + sin^(2) 2^(@) + sin^(2) 3^(@)+ . . . . + sin^(2) 89^(@) + sin ^(2) 90^(@) is

sin (B + 2C) + sin (C + 2A) + sin (A + 2B) = 4sin ((BC) / (2) sin ((CA) / (2)) sin ((AB) / (2)

Find the number of beats produced per sec by the vibrations x_1=A sin (320 pi t) and x_2=A sin(326 pi t) .

Find the number of beats produced per sec by the vibrations x_1=A sin (320 pi t) and x_2=A sin(326 pi t) .

If A, B, C are angle of a triangle ABC, then the value of the determinant |(sin (A/2), sin (B/2), sin (C/2)), (sin(A+B+C), sin(B/2), cos(A/2)), (cos((A+B+C)/2), tan(A+B+C), sin (C/2))| is less than or equal to