(1+cosA)^2+(1-cosA)^2/sin^2A=2(1+2cot^2A)
Answers
Answered by
4
Answer:
Starting with the LHS, the sum would be
1
+
cos
A
+
1
−
cos
A
(
1
+
cos
A
)
(
1
−
cos
A
)
=
2
1
−
cos
2
A
=
2
sin
2
A
=
2
csc
2
A
=
2
(
1
+
cot
2
A
)
=
2
+
2
cot
2
A
Similar questions