cos²26° + cos 64° sin 26° + tan 36°\ cot 54°
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cos²26° + cos 64° sin 26° + tan 36°\ cot 54°
= cos²26 + cos64.cos64 + tan36°/tan36°
= cos²26 + cos²64 + 1
= cos²26 + sin² 26 + 1
= 1+1
= 2
used identity
cos²∅ + sin²∅ = 1
sin(90-∅) = cos∅
cot(90-∅) = tan∅
hope this will help you
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