Asked by Phil-- HELP NEEDED ASAP
Verify the Identity:
sin(x+π)/cos(x+3π/2) =tan^2x-sec^2x
I've done:
sinxcosπ+cosxsinπ
/
cosxcos(3π/2) - sinxsin(3π/2)
sinx(-1) + cosx(0)
/
cosx(0)- sinx(-1)
-sinx/sinx
What do I do from here? Or what did I do wrong?
sin(x+π)/cos(x+3π/2) =tan^2x-sec^2x
I've done:
sinxcosπ+cosxsinπ
/
cosxcos(3π/2) - sinxsin(3π/2)
sinx(-1) + cosx(0)
/
cosx(0)- sinx(-1)
-sinx/sinx
What do I do from here? Or what did I do wrong?
Answers
Answered by
Steve
first, note that since sec^2 = 1+tan^2, the right side is just -1
On the left, you have arrived at sinx/sinx = -1
Done
On the left, you have arrived at sinx/sinx = -1
Done
Answered by
Phil-- HELP NEEDED ASAP
thank you!
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