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# Trignomertirical Equations Problem Watch

1. so I'm having problems answering this question:

Solve, for –180° ≤ X < 180°

(1 + tan X)(5 sin X – 2) = 0
2. Tanx = sinx/cosx
3. Then multiply out
4. What happens if and/or .

So we have <--- standard angle.

Also .
Use the fact that tan has a period of and sin has a period of to find all the answers in the specified range.
The question is almost solved for you, there is no manipulation required all you need to do is what I did above.
5. Might also have to use sin^2 + cos^2 = 1 and rearranged
6. Do the inverse as there are solutions for tan, cos and sin between -1 and 1
7. (Original post by audreygal)
Then multiply out
this is not necessary...

if A x B = 0

then either A = 0 or B = 0

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Updated: April 2, 2016
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