Evaluate: sec2 18° - cot2 72°.
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Evaluate: sin(90° - A) cos A + cos (90° - A) sin A
0
cosec θ - 1
cosec θ + 1
cosec θ
sec θ + 1
sec A + tan A
cosec A + cot A
1 + sec A
cosec A + 1
1 + sec θ
Evaluate: sin2 35° + sin2 55°
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