`tan100^0+tan125^0+tan100^0tan125^0` is equal to 0 (b) `1/2` (c) `-1` (d) 1

The value of tan6^0tan42^0tan66^0tan78^0 is (a)1 (b) 1/2 (c) 1/4 (d) 1/8

If theta_1 and theta_2 are two values lying in [0,2pi] for which t a ntheta=lambda, then tan((theta_1)/2)tan((theta_2)/2) is equal to (a)0 (b) -1 (c) 2 (d) 1

If secx+sec^2x=1 then the value of tan^8x-tan^4x-2tan^2x+1 will be equal to 0 (b) 1 (c) 2 (d) 3

Prove that tan70^0=2tan50^0+tan20^0

Prove that tan20^0tan40^0tan60^0tan80^0 =3

If alpha,beta,gamma are acute angles and costheta=sinbeta//sinalpha,cosvarphi=singamma//sinalpha and cos(theta-varphi) = sinbetasingamma , then the value of tan^2alpha-tan^2beta-tan^2gamma is equal to (a) -1 (b) 0 (c) 1 (d) 2

If 3tan^(-1)(1/(2+sqrt(3)))-tan^(-1)1/x=tan^(-1)1/3, then x is equal to 1 (b) 2 (c) 3 (d) sqrt(2)

tan^6(pi/9)-33tan^4(pi/9)+27tan^2(pi/9) is equal to (a)0 (b) sqrt3 (c) 3(d)9

If sintheta_1sintheta_2-costheta_1costheta_2+1=0, then the value of tan((theta_1)/2)cot((theta_2)/2) is equal to (a) -1 (b) 1 (c) 2 (d) -2

tan(pi/4+1/2cos^(-1)x)+tan(pi/4-1/2cos^(-1)x),x!=0, is equal to x (b) 2x (c) 2/x (d) none of these