kumari9gt
kumari9gt
24-08-2020
Mathematics
contestada
cosA×cos2A+sinA×sin2A=cos (2A-A)
Respuesta :
makiyahs117
makiyahs117
24-08-2020
Answer:
csc
A
, as desired!
Step-by-step explanation:
cos
2
A
sin
A
+
sin
2
A
cos
A
,
=
cos
2
A
cos
A
+
sin
2
A
sin
A
sin
A
cos
A
,
=
cos
(
2
A
−
A
)
sin
A
cos
A
,
=
cos
A
sin
A
cos
A
,
=
1
sin
A
,
=
csc
A
, as desired!
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