Question

cos A /1-tanA + sin^2A/sinA -cosA =cos A +sinA​

Answer 1

Answer:

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Step-by-step explanation:

ANSWER

sinA= msinB⟶ (1)

tanA= ntanB

cos A

sin A

=

n

cosB

sinB

⟶ (2)

Substituting sinB from equation 1, we get

⟹ cosB=

m

n

cosA⟶ (3)

sin 2

2

m 2

1−

cos 2

m 2

cos 2

Substituting equation 3, we get

1−

cos 2

m 2

m 2

n 2

cos 2

cos 2

n 2 − 1

m 2 − 1

(proved)