CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

If the product (sin1)(sin3)(sin5)(sin7).........(sin89)=12n, then find the value of n.

Open in App
Solution

sin1sin3sin5.........sin89=12n

sin1sin2sin3.....sin88sin89sin2sin4sin6.....sin88=12n

sin1sin89sin2sin88....sin44sin(46)sin45sin2sin4sin6.....sin88=12n

sin1sin(901)sin2sin(902).................sin44sin(9044)sin45sin2sin4sin6.........sin88=12n

sin1cos1sin2cos2.................sin44cos44sin45sin2sin4sin6.........sin88=12n ...........cosA=sin(90˚A)

sin2sin4...........sin88sin45244(sin2sin4...........sin88=12n ...............[sin2x=2sinxcosx]

12442=12n

n=4412=892

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Extrema
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon