how should i start this 1 - cos^2 theta/ 1 + sin theta = (convert to) sin theta please help
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Originally Posted by xahjika how should i start this 1 - cos^2 theta/ 1 + sin theta = (convert to) sin theta please help Recall that
it says that prove that it is an identity 1 - cos^2 theta/ 1 + sin theta = sin theta
Originally Posted by xahjika it says that prove that it is an identity 1 - cos^2 theta/ 1 + sin theta = sin theta I have figured it out, and made the edits. But please, in the future, be more clear and add parentheses.
That identity is not true. Are you sure you're written it correctly? Edit: Ah right, I was reading it incorrectly also... nevermind.
so sorry i don't know that... i'm just copying what's on the board
Originally Posted by Chop Suey Recall that with that do i have to foil method this? --> (1 - sin theta)(1 + sin theta)/ 1 + sin theta or cancel the(1 + sin theta).. / 1 + sin theta here --> (1 - sin theta)(1 + sin theta)/ 1 + sin theta
is this right? red means canceled out 1 - sin^2 theta = (1 - sin theta) (1 + sin theta)/ (1 + sin theta)= 1 - ( 1 - sin theta) = sin theta
Originally Posted by xahjika is this right? red means canceled out 1 - sin^2 theta = (1 - sin theta) (1 + sin theta)/ (1 + sin theta)= 1 - ( 1 - sin theta) = sin theta Yes, you have to cancel out like you just did. There are inconsistencies in your work that you may have to fix.
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