Question

Find the value.
(Maths)

Answer 1

Hi dear..
here is your answer...
..sin²thetha+ 2costhetha-2=0
1-cos²thetha+ 2costhetha-2=0.
-cos²thetha + 2costhetha-1=0
cos²thetha -2costhetha +1 =0..
now....

let costhetha be x
x²-2x+1=0
(x-1)^2 =0
x-1=0
x=1......

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see picture......
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.hope it helped you...
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