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

Range of f(x) =sin^20x+cos^48x is (A) [0,1] (B) (0,1] (C) (0,oo) (D) none of these

The value of the expression (1-4sin 10^0 sin 70^0)/(2sin 10^0 ) is- a.1/2 b. 1 c.2 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

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

The value of sin^(2)(cos^(-1)((1)/(2))+cos^(2)(sin^(-1)((1)/(3))) is: (A) (17)/(36) (B) (59)/(36) (C) (36)/(59) (D) none of these

int(cosx+sinx)/sqrt(sin2x)dx= (A) sin^-1(cosx+sinx) (B) sin^-1(sinx-cosx) (C) cos^-1(cosx+sinx) (D) none of these

If sin^(-1)x-cos^(-1)x=pi/6 , then x= 1/2 (b) (sqrt(3))/2 (c) -1/2 (d) none of these