Home
Class 12
MATHS
Prove that sin 78^(@) + cos132^(@) = (sq...

Prove that `sin 78^(@) + cos132^(@) = (sqrt(5)-1)/(4)`.

Promotional Banner

Topper's Solved these Questions

  • TRANSFORMATIONS AND INDENTITIES

    AAKASH SERIES|Exercise EXERCISE -4.1 (SHORT ANSWER QUESTIONS)|9 Videos

  • TRANSFORMATIONS AND INDENTITIES

    AAKASH SERIES|Exercise EXERCISE -4.2 (LONG ANSWER QUESTIONS)|30 Videos

  • TRANSFORMATIONS AND INDENTITIES

    AAKASH SERIES|Exercise PRACTIVE EXERCISE|36 Videos

  • THEORY OF EQUATIONS

    AAKASH SERIES|Exercise EXERCISE-III|46 Videos

Similar Questions

Explore conceptually related problems

Prove that cos 48^(@) . Cos 12^(@) =(3+sqrt5)/(8) .

Prove that sin^(2)42^(@)-cos^(2)78^(@) .

sin 78^(@) - sin 18^(@) + cos 132^(@) =

Prove that cos 20^(@) cos 40^(@) - sin5^(@) sin 25^(@) = (sqrt(3)+1)/(4) .

Prove that cos 12^(@) + cos 84^(@) +cos 132^(@) + cos 156^(@) =-1//2

The value of cos^(-1)((sqrt(5)-1)/4)=

Prove that cos48^@.cos12^@=(3+sqrt5)/8 .

Prove that sin21^(@)cos9^(@)-cos84^(@)cos6^(@)=1/4 .

Prove that 4(cos66^(@)+sin84^(@)) = sqrt(3) + sqrt(15) .