[" 2."sin163^(@)cos347^(@)+sin73^(@)sin167^(@)=],[" (b) "1/2]" (c) "1" (d) none of these "

sin163^(@)cos347^(@)+sin73^(@)sin167^(@)=(A)0 (B) (1)/(2)(C)1(D) none of these

Evaluate : sin163^@.cos347^@+sin73^@.sin167^@.

s in163^(0)cos347^(0)+s in73^(0)s in167^(0)=1/2 b.1 c.0 d.none of these

sin 163^0cos 347^0+sin 73^0sin 167^0= a. 1//2 b. 1 c. 0 d. none of these

If cos A+cos^(2)A=1, then sin^(2)A+sin^(4)A=-1(b)0(c)1(d) None of these

If cosA+cos^2A=1 , then sin^2A+sin^4A= (a) -1 (b) 0 (c) 1 (d) None of these

If sin x+sin y=sqrt(3)(cos y-cos x), then sin3x+sin3y=(a)2sin3x( b) 0(c)1(d) none of these

sin^-1 (cos(sin^-1(sqrt(3)/2))= (A) pi/3 (B) pi/6 (C) - pi/6 (D) none of these

sin^-1 (cos(sin^-1(sqrt(3)/2))= (A) pi/3 (B) pi/6 (C) - pi/6 (D) none of these

The value of tan {sin^(-1)(cos(sin^(-1)x))} tan{cos^(-1) (sin(cos^(-1)x))} x in (0,1) a)0 b)1 c)-1 d)None of these