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trigonometry help please (1 Viewer)
- Thread starter noobles
- Start date
Trev
stix
cos2x=1-2sin<sup>2</sup>x=2cos<sup>2</sup>x-1
So:
(1-cos2x)/(1+cos2x)
=(1-1+2sin<sup>2</sup>x)/(1+2cos<sup>2</sup>x-1)
=(2sin<sup>2</sup>x)/(2cos<sup>2</sup>x)
=tan<sup>2</sup>x.
So:
(1-cos2x)/(1+cos2x)
=(1-1+2sin<sup>2</sup>x)/(1+2cos<sup>2</sup>x-1)
=(2sin<sup>2</sup>x)/(2cos<sup>2</sup>x)
=tan<sup>2</sup>x.