2 cos27/ sin63+ tan21/ cot63+ cos0
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sin theta = cos (90-theta)
cot theta = cos (90-theta)
= 2 cos27/sin 63 + tan27/cot 63 + cos 0
=2 cos27/cos(90-63) + tan27/tan(90-63 + cos 0
= 2 (cos27/cos27) + tan27/tan27 + 1
= 2+1+1
= 4
cot theta = cos (90-theta)
= 2 cos27/sin 63 + tan27/cot 63 + cos 0
=2 cos27/cos(90-63) + tan27/tan(90-63 + cos 0
= 2 (cos27/cos27) + tan27/tan27 + 1
= 2+1+1
= 4
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