SOLUTION: If cotA=7/8 then evaluate 1) (1+sinA)(1-sinA)/(1+cosA)(1-cosA) 2) cot^2A

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Question 954977: If cotA=7/8 then evaluate
1) (1+sinA)(1-sinA)/(1+cosA)(1-cosA)
2) cot^2A
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
If cotA=7/8 then evaluate
1) (1+sinA)(1-sinA)/(1+cosA)(1-cosA)
2) cot^2A
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use x for A
cotx=7/8
1) (1+sinx)(1-sinx)/(1+cosx)(1-cosx)
1-sin^2(x)/1-cos^2(x)
cos^2(x)/sin^2(x)=cot^2(x)=49/64
..
2) cot^2x=49/64