1 + 10 square theta 1 class 10th squared theta
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Step-by-step explanation:
(1 + tan²Ф) (1+sinФ) (1-sinФ)
using the formulas,
(sec²Ф)(1-sin²Ф) -------------(1+tan²Ф=sec²Ф0 and (a+b)(a-b)=(a²-b²)
(sec²Ф)(cos²Ф)
1=rhs
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