If `tanalpha=(1-cosbeta)/(sinbeta),t h e n` (a)`tan3alpha=tan2beta` (b) `tan2alpha=tanbeta` (c) `tan2beta=tanalpha` (d) none of these

(1+tan alpha tan beta)^2 + (tan alpha - tan beta)^2 =

If tan(alpha-beta)=(sin2beta,)/(3-cos2beta) then (a) tanalpha=2tanbeta (b) tanbeta=2tanalpha (c) 2tanalpha=3tanbeta (d) 3tanalpha=2tanbeta

If tan (alpha-beta)=(sin 2beta)/(3-cos 2beta) , then

If alpha=tan^(-1)(t a n(5pi)/4)a n dbeta=tan^(-1)(-tan((2pi)/3)),t h e n (a) 4alpha=3beta (b) 3alpha=4beta (c) alpha-beta=74alpha=(3beta)/(12) (d) none of these

If alpha=tan^(-1)(t a n(5pi)/4)a n dbeta=tan^(-1)(-tan(2pi)/3),t h e n 4alpha=3beta (b) 3alpha=4beta (c) alpha-beta=74alpha=(3beta)/(12) none of these

If : sin (alpha + beta)=1 and sin (alpha-beta)=(1)/(2), "then" : tan (alpha+2beta)*tan(2alpha+beta)=

cos(alpha+beta)+sin(alpha-beta)=0"and"tanbeta=1/2009 ,find tan(alpha)

If alpha+beta=pi/4 then (1+tan alpha)(1+tan beta)=

By geometrical interpretation, prove that tan(alpha+beta)=(tanalpha+tanbeta)/(1-tanalphatanbeta) .

If alpha+beta+gamma=2pi, then (a) tan(alpha/2)+tan(beta/2)+tan(gamma/2)=tan(alpha/2)tan(beta/2)tan(gamma/2) (b) tan(alpha/2)tan(beta/2)+tan(beta/2)tan(gamma/2)+tan(gamma/2)tan(alpha/2)=1 (c) tan(alpha/2)+tan(beta/2)+tan(gamma/2)=-tan(alpha/2)tan(beta/2)tan(gamma/2) (d)none of these