Solve the equation:

.Or if you like the equivavalent:

.

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- December 30th 2008, 02:23 AMjames_bondTrigonometric equation
Solve the equation:

.Or if you like the equivavalent:

. - December 30th 2008, 03:26 AMSkalkaz
Dear james_bond,

or if you like the equivavalent:

hint: in [] brackets there is sin(a+b) with suitable a and b. - December 30th 2008, 06:13 AMSoroban
Hello, james_bond!

Quote:

Solve the equation: .

Square both sides: .

. . . . . .

. . . . . .

. . . . . . . . . . . . . . .

. . . . . . . . . . . . . .

But we find that half of the roots are extraneous.

The equation is satisfied only if is in Quadrant 1.

Therefore: .