Asked by Caroline
Prove these identites
I really need help with these I don't understand how to do them !!!!
sin^2+tan^2=sec^2-cos^2
sin^2 sec^2 +sin^2=tan^2+sin^2
I really need help with these I don't understand how to do them !!!!
sin^2+tan^2=sec^2-cos^2
sin^2 sec^2 +sin^2=tan^2+sin^2
Answers
Answered by
Steve
a good place to start is usually to make everything sin/cos:
sin^2 + sin^2/cos^2
[(1-cos^2)cos^2 + sin^2]/cos^2
(cos^2 - cos^4 + 1 - cos^2)/cos^2
(1 - cos^4)/cos^2
1/cos^2 - cos^2
sec^2 - cos^2
_______________________
sin^2/cos^2 + sin^2
tan^2 + sin^2
sin^2 + sin^2/cos^2
[(1-cos^2)cos^2 + sin^2]/cos^2
(cos^2 - cos^4 + 1 - cos^2)/cos^2
(1 - cos^4)/cos^2
1/cos^2 - cos^2
sec^2 - cos^2
_______________________
sin^2/cos^2 + sin^2
tan^2 + sin^2
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.