SOLUTION: Prove this identity {{{ (sin2x + cos2x -1) / (sin2x + cos2x +1) }}} = {{{ (1 - tanx )/ (1+cotx) }}}
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-> SOLUTION: Prove this identity {{{ (sin2x + cos2x -1) / (sin2x + cos2x +1) }}} = {{{ (1 - tanx )/ (1+cotx) }}}
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Question 217331
:
Prove this identity
=
Answer by
drj(1380)
(
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Prove this identity
=
Step 1.
,
,
, and
Step 2. Let's work the numerator:
Factor
Step 3. Let's work with the denominator:
Factor
Step 4. Now combine the equations Step 3 and 4
=
But
=
=
Step 5 ANSWER:
=
