evaluate sec square 37 degree -cot square 53 degree. tan 21 degree tan 69 degree - sin 41 degree sin 49 degree
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Step-by-step explanation:
Sec²37° - Cot²53°
Cosec²53° - Cot²53°
1 + Cot²53° - Cot²53° = 1
Now , tan21° * tan69° - Sin41° * Sin49°
tan21° * Cot21° - 2Sin41° * Cos41°/2
1 - Sin82°/2
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