Home
Class 12
MATHS
If costheta=(cosalpha+cosbeta)/(1+cosalp...

If `costheta=(cosalpha+cosbeta)/(1+cosalphacosbeta),\ ` prove that `tantheta/2=\ =-tanalpha/2tanbeta/2`

Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRIC FUNCTIONS AND IDENTITIES

    ARIHANT MATHS|Exercise Exercise For Session 10|10 Videos

  • TRIGONOMETRIC FUNCTIONS AND IDENTITIES

    ARIHANT MATHS|Exercise Exercise For Session 11|10 Videos

  • TRIGONOMETRIC FUNCTIONS AND IDENTITIES

    ARIHANT MATHS|Exercise Exercise For Session 8|10 Videos

  • TRIGONOMETRIC EQUATIONS AND INEQUATIONS

    ARIHANT MATHS|Exercise Exercise (Questions Asked In Previous 13 Years Exam)|12 Videos

  • VECTOR ALGEBRA

    ARIHANT MATHS|Exercise Exercise (Questions Asked In Previous 13 Years Exam)|9 Videos

Similar Questions

Explore conceptually related problems

(1+cosalphacosbeta)^2-(cosalpha+cosbeta)^2=

If costheta=(cosalpha-e)/(1-e cosalpha),\ prove that tantheta/2=+-sqrt((1+e)/(1-e))tanalpha/2dot

Prove that : cos^(-1)((cosalpha+cosbeta)/(1+cosalphacosbeta))=2\ tan^(-1)(tanalpha/2tanbeta/2)

(1+tanalphatanbeta)^2+(tanalpha-tanbeta)^2=

If cosalpha+cosbeta=0=sinalpha+sinbeta , then prove that cos2alpha +cos2beta=-2cos(alpha +beta) .

Prove that- costheta.tantheta=sintheta

If cosalpha+cosbeta=0=sinalpha+sinbeta , then cos2alpha+cos2beta=?

Prove that (1-cosalpha)/sinalpha=tan(alpha/2)

If 1/(cosalpha cosbeta) +tanalpha tanbeta =tan gamma, show that cos2gammale0

If : cos^(2)theta-sin^(2)theta=tan^(2)alpha and costheta*cosalpha=cosbeta, "then" : beta=