Prove :
1-tan^2 A/1+tan^2 A = cos^2 A- 1 / cos^2 A+1
Answers
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Step-by-step explanation:
L.H.S=
1+tan
2
A
1−tan
2
A
=
sec
2
A
1−tan
2
A
∵(1+tan
2
A=sec
2
A)
=cos
2
A−
sec
2
A
tan
2
A
=cos
2
A−sin
2
A
=cos
2
A−(1−cos
2
A)
=2cos
2
A−1
=R.H.S
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