Math, asked by preetimehra766, 11 months ago

9. sin (n+1) A sin (n-1)A + cos(n+1)A
cos(n-1) A=cos2A
11. tan 69° + tan 66°/1- tan 69º tan 66°
= -1
plzz help
..​

Answers

Answered by mansnotzombie
1

Answer:

Refer to attached figure

Attachments:
Answered by Anonymous
2

Answer:

BY THE WAY MYSELF HARSH FROM MAHARASHTRA STUDYING IN CLASS 11 . I LIKE TO MAKE FRIENDS BUT NOT BAD FRIENDS . SO I THINK THAT YOU WILL BE A GOOD FRIEND TO ME. DO YOU WANT TO KNOW ANYTHING ELSE

Similar questions