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Assignment Expert
08.03.19, 23:29
The last formula is
cos^2(a)+cos^2(b)+1+cos^2(a)*cos^2(b)-cos^2(a)-cos^2(b)=1+cos^2(a)*cos^2(b)
Ankur
08.03.19, 20:26
but which is the last formula
Assignment Expert
08.03.19, 18:16
If you simplify the left-hand side in the last formula, then you get
1+cos^2(a)*cos^2(b), which equals to the right-hand side in the last
formula. Thus, the initial identity was proved.
Ankur
08.03.19, 17:49
the answer is not done fully
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Comments
The last formula is cos^2(a)+cos^2(b)+1+cos^2(a)*cos^2(b)-cos^2(a)-cos^2(b)=1+cos^2(a)*cos^2(b)
but which is the last formula
If you simplify the left-hand side in the last formula, then you get 1+cos^2(a)*cos^2(b), which equals to the right-hand side in the last formula. Thus, the initial identity was proved.
the answer is not done fully
Leave a comment