cos2thetta - sin2thetta = 1-2 Sin2thetta
Answers
Answered by
6
Answer:
The Pythagorean identity states that
sin
2
θ
+
cos
2
θ
=
1
.
We can rearrange the identity to see that
cos
2
θ
=
1
−
sin
2
θ
.
If we know that
cos
2
θ
=
1
−
sin
2
θ
, we can replace
cos
2
θ
with
1
−
sin
2
θ
in the expression
cos
2
θ
−
sin
2
θ
.
cos
2
θ
−
sin
2
θ
=
(
1
−
sin
2
θ
)
−
sin
2
θ
Combine like terms to see that:
cos
2
θ
−
sin
2
θ
=
1
−
2
sin
2
θ
mahimaa19:
no breakfast
Answered by
6
Answer:
bhaiya i don't know sorry brainliest toh kar dena
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