-sinAcscA- sin^2A- cos^2A-tanAcotA wut would it equal?? is it -3
I Iknownothing17 New member Joined Nov 1, 2007 Messages 6 Nov 30, 2007 #1 -sinAcscA- sin^2A- cos^2A-tanAcotA wut would it equal?? is it -3
G galactus Super Moderator Staff member Joined Sep 28, 2005 Messages 7,216 Nov 30, 2007 #2 Re: Trig identity Yes it would.
S soroban Elite Member Joined Jan 28, 2005 Messages 5,586 Dec 1, 2007 #3 Hello, Iknownothing17! \(\displaystyle -\sin A\csc A - \sin^2A - \cos^2A - \tan A\cot A\) wut would it equal? .is it -3? . . . . Yes! Click to expand... \(\displaystyle \text{We have: }\;-\underbrace{\sin A\cdot\frac{1}{\sin A}}_{\text{This is 1}} \; - \; \underbrace{(\sin^2A + \cos^2A)}_{\text{This is 1}} \;- \; \underbrace{\tan A\cdot\frac{1}{\tan A}}_{\text{This is 1}} \;\;=\;\; -\:1 \;- \;1 \;- \;1 \;\;=\;\;-3\)
Hello, Iknownothing17! \(\displaystyle -\sin A\csc A - \sin^2A - \cos^2A - \tan A\cot A\) wut would it equal? .is it -3? . . . . Yes! Click to expand... \(\displaystyle \text{We have: }\;-\underbrace{\sin A\cdot\frac{1}{\sin A}}_{\text{This is 1}} \; - \; \underbrace{(\sin^2A + \cos^2A)}_{\text{This is 1}} \;- \; \underbrace{\tan A\cdot\frac{1}{\tan A}}_{\text{This is 1}} \;\;=\;\; -\:1 \;- \;1 \;- \;1 \;\;=\;\;-3\)
