}
Hence CAUB)'= (DUB)
If
A= 21,20 find
PCA) an
grona
cau
Answers
Answered by
2
Answer:
samajh nyy aya
Step-by-step explanation:
please mark as brainliest answer
Answered by
0
Step-by-step explanation:
If tanθ=
21
20
, then prove that
1+sinθ+cosθ
1−sinθ+cosθ
=
7
3
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ANSWER
tanθ=
21
20
As 1+tan
2
θ=sec
2
θ
1+
21×21
20×20
=sec
2
θ
1+
441
400
=sec
2
θ
441
841
=sec
2
θ
secθ=
21
29
cosθ=
29
21
(1)
As 1=cos
2
θ+sin
2
θ
1=
29×29
21×21
+sin
2
θ
1=
841
441
+sin
2
θ
1−
841
441
=sin
2
θ
841
400
=sin
2
θ
29
20
=sinθ (2)
1+sinθ+cosθ
1−sinθ+cosθ
(3)
Substituting (1) and (2) in (3)
1+
29
20
+
29
21
1−
29
20
+
29
21
=
1+
29
41
1+
29
1
=
29
70
29
30
=
70
30
=
7
3
LHS=RHS
Hence proved.
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