(1+-cos^(2)(45^(@)+1))/(1-t+10^(2)(45^(n...

(1+-cos^(2)(45^(@)+1))/(1-t+10^(2)(45^(n)))=cosec1

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(1+-cos^(2)(45^(@)+1))/(1-t+10^(2)(45^(n)))=cosec1
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(cos A) / (1 + -sin A) = tan (45 ^ (@) + - (A) / (2))
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(1 + tan ^ (2) (45-A)) / (1-tan ^ (2) (45-A)) = cos ec2A
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Prove that: cos(45^(@)+A) cos(45^(2)-A)=1/2 cos2A
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सत्यता की जाँच कीजिए- cos 90^(@)=1-2sin ^(2)45^(@)=2cos ^(2)45^(@)-1
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सिध्द कीजिए कि: tan (45^(@) + (A)/(2)) = (cos A)/(1-sinA)
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sin (45^(@) +A) sin .(45^(@) –A) =(1)/(2) cos 2A
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निम्नलिखित को सिद्ध कीजिए : cos 90^(@) = 1 - 2 sin^(2) 45^(@) = 2 c...
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cos 45^@=1/sqrt2 and sin 30^(@)=1/2. Find the value of cos^(2)45^(@)+s...
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