Question

if 1+4 tan theta=4 sec theta then cos theta is

Answer 1

Answer:

let's take theta as x (as theta is too long to type)

So

1+4tanx = 4secx

1/4=secx -tanx

(multiplying both side by secx + tanx,we get:)

Secx + tanx =4

(adding secx-tanx and secx + tanx)

2secx = 17/4

secx = 17/8

So cosx = 8/17

Hope it helps

I haven't added the substitution of identity 1 in this

it's easy to do just substitute it

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