cos² 57° + cos² 33° = 1
Hurry guys
Answers
Answered by
4
cos²A=1-sin²A
cos² 57 +1-sin² 33=1
cos² 57-sin²33=0
sin²33-sin²33=0
0=0
HENCE PROVED....
HOPE IT'S HELPFUL...
Answered by
2
Answer:
LHS=cos² 57⁰ + cos² 33⁰
=cos² 57⁰ + cos² (90⁰-57⁰)
= cos² 57⁰ + sin² 57⁰
= 1=RHS(Proved)
PLEASE MARK AT BRAINLIST
Similar questions