Answers

2015-08-18T15:56:32+05:30
Cos60 =1/2 Sin 90 =1 Cot 45=1 First mention all the values then square them, So, Cos^2 60= 1/4 Sin^2 90 = 1 Cot ^2 45= 1 So 1/4 x 1 - 1 1/4 -1 =-3/4 ☺
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