When cos(x) + sin(x) = 0 I can see how cos(x) cannot equal 0.

But when written as cos(x)[1 + tan(x)] = 0 cos(x) can be 0?

Could someone please try to explain this to me :)

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- Jan 9th 2013, 07:21 AMkinhew93General trig question
When cos(x) + sin(x) = 0 I can see how cos(x) cannot equal 0.

But when written as cos(x)[1 + tan(x)] = 0 cos(x) can be 0?

Could someone please try to explain this to me :) - Jan 9th 2013, 07:42 AMebainesRe: General trig question
- Jan 9th 2013, 08:20 AMSorobanRe: General trig question
Hello, kinhew93!

Quote:

We have: .

. . . . . . . . . . . You are right:

. . . . . . . .

Therefore: n .