Home
Class 12
MATHS
Calculate cos ((alpha)/(2)) if sin alpha...

Calculate `cos ((alpha)/(2))` if `sin alpha=4/5` and alpha `alpha in ((-3pi)/(2),-pi)`

Promotional Banner

Topper's Solved these Questions

  • TRIGNOMETRIC RATIOS & IDENTITIES

    MOTION|Exercise Exercise 1|47 Videos

  • TRIGNOMETRIC RATIOS & IDENTITIES

    MOTION|Exercise Exercise 2(Level -I)|36 Videos

  • THREE DIMENSIONAL GEOMETRY (3 -D)

    MOTION|Exercise SOLVED EXAMPLE|33 Videos

  • TRIGONOMETRIC EQUATION

    MOTION|Exercise EXERCISE 4|10 Videos

Similar Questions

Explore conceptually related problems

Calculate tan((alpha)/(2)) if cos 2 alpha=7/32 and alpha in (-pi,-(3pi)/(4))

Calculate tan alpha if cos alpha =- sqrt(5)/(5) and alpha in (pi (3pi)/(2))

Calculate sin alpha if cos alpha=-9/11 and alpha in (pi,(3pi)/(2))

The expression (sin alpha+cos alpha)/(cos alpha-sin alpha) tan((pi)/(4)+alpha)+1, alpha in (-(pi)/(4), (pi)/(4)) simplifies to :

sin alpha-sin2 alpha+sin3 alpha=4cos(3 alpha)/(2)cos alpha sin(alpha)/(2)

"If "y=sqrt((2(tanalpha+cotalpha))/(1+tan^(2)alpha)+(1)/(sin^(2)alpha))"when "alpha in ((3pi)/(4),pi)"then find "(dy)/(dalpha)" at"alpha=(5pi)/(6)

lim_(alpha rarr(pi)/(4))(sin alpha-cos alpha)/(alpha-(pi)/(4))

(sqrt(2)-sin alpha-cos alpha)/(sin alpha-cos alpha) is equal to (a)sec((alpha)/(2)-(pi)/(8))(b)cos((pi)/(8)-(alpha)/(2))(c)tan((alpha)/(2)-(pi)/(8))(d)cot((alpha)/(2)-(pi)/(2))

The value of (sin(pi-alpha))/(sin alpha-cos alpha tan.(alpha)/(2))-cos alpha is

" If cos(alpha+beta)=(3)/(5) sin(alpha-beta)=(5)/(13) and 0< alpha, beta < (pi)/(4) then tan(2 alpha) is equal to