Question

help with trig identities?

Answer 1

(sin)(tan*cos-cot*cos)=1-2cos^2

Answer 2

Using identities I think it should be converted to
\[(\sin)(\frac{ \sin }{ \cos }\times \frac{ \cos }{ \cos }-\frac{ \cos }{ \sin }\times \frac{ \cos }{ \cos })=1-2\cos^2\]

Answer 3

but i dont know what to do after that

Answer 4

\[(\sin)(\frac{\sin}{\cos}\times \cos - \frac{\cos}{\sin}\times \cos)\]

Answer 5

okay now?

Answer 6

Would that be
\[(\sin)(\frac{ \sin \cos }{ \cos^2 }-\frac{ \cos^2 }{ \sin \cos })\]

Answer 7

\[\sin ( \sin-\frac{\cos^{2}}{\sin}\]

Answer 8

okay?

Answer 9

you got that from my answer? or is that what I should have simplified it to?

Answer 10

u should have simplified.. cos and cos gets cancelled left with sin alone.

Answer 11

numerator with the numerator and denominator with denominator always