Question

If sec + tan = k, then cos. equals:
2​

Answer 1

Answer:

if sec theta+tan theta=K

1/cos theta+sin tetha/cos theta=K

1+sin theta=K cos thata

cos theta =(1+sin)/k

Answer 2

Answer:

Given secθ+tanθ=k

As we know that

sec

2

θ−tan

2

θ=1

⟹(secθ+tanθ)(secθ−tanθ)=1

⟹secθ−tanθ=

k

1

⟹secθ=

2

k+

k

1

=

2k

1+k

2

⟹cosθ=

k

2

+1

2k

Step-by-step explanation:

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