solve x 2tan(inverse)(sin x)=tan(inverse)(2sec x) 0<x<90

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- Mar 28th 2011, 01:11 AMprasumtrigo inverse
solve x 2tan(inverse)(sin x)=tan(inverse)(2sec x) 0<x<90

- Mar 28th 2011, 01:13 AMProve It
Is this your equation?

for ... - Mar 28th 2011, 06:50 AMSoroban
Hello, prasum!

Quote:

Let: . .[1]

And the equation becomes: .

Take the tangent of both sides: .

. . And we have: .

Substitute [1]: .

. . And we have: .

Since

Therefore: .

- Mar 28th 2011, 07:03 AMprasum