Question

If 3cos A= 4, check whether (1-tan^2A)/(1+tan^A) = cos ^2 A - sin^A or not??​

Answer 1

Answer:

i don't understand your question.........

please write properly

Answer 2

Answer:

1+tan

2

A

1−tan

2

A

=

1+((sin

2

A)/cos

2

(A))

1−(sin

2

A/cos

2

A)

=

cos

2

A+sin

2

A

cos

2

A−sin

2

A

=cos

2

A−sin

2

A

∴

1+tan

2

A

1−tan

2

A

is always equal to

cos

2

A−sin

2

A for all values of cotA