Home
Class 11
MATHS
If sinalpha=3//5 and 90^(@)ltalphalt180^...

If `sinalpha=3//5 and 90^(@)ltalphalt180^(@)` then `cos3alpha=`

A

`44/125`

B

`64/125`

C

`34/125`

D

`54/125`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • MULTIPLE & SUBMULTIPLE ANGLES

    AAKASH SERIES|Exercise EXERCISE-II|52 Videos

  • MULTIPLE & SUBMULTIPLE ANGLES

    AAKASH SERIES|Exercise PRACTICE EXERCISE|68 Videos

  • MULTIPLE & SUBMULTIPLE ANGLES

    AAKASH SERIES|Exercise ADDITIONAL EXERCISE |15 Videos

  • MULTIPLE & SUBMULTIPLE

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERCISE - II) (LEVEL - II) (Linked Comprehension Type Questions)|5 Videos

  • MULTIPLE PRODUCT OF VECTORS

    AAKASH SERIES|Exercise PRACTICE EXERCISE|62 Videos

Similar Questions

Explore conceptually related problems

If tan alpha = (q)/(p) and alpha lt 90^(@) ," then " (q sin alpha - p cos alpha )/( q sin alpha + p cos alpha ) =

If sin alpha = 3/5 , where (pi)/2 lt alpha lt pi , evaluate cos 3 alpha .

If sec alpha = (13)/(5) " where " alpha lt 90^(@) , then the value of (2-3 cot alpha )/(4-9 tan alpha ) =

If cos A =-3//5 , sin B=7//25 and 90^(@) lt A lt 180^@,0^(@) lt B lt 90^(@) , "then " tan (A+B)=

If sinalpha+sinbeta=1//2 and cosalpha+cosbeta=sqrt(3)//2 then 3beta+alpha =

If alpha+beta=90^@ and alpha=2beta , then cos^2alpha+sin^2beta = …………………

If cos alpha = -12//13 , cot beta = 24//7 , 90^(@) lt alpha lt 180^(@) and 180^(@) lt beta lt 270^(@) , then the quadrant in which alpha + beta lies