underfoot 1+sin. a upon 1-sin. a=sec. a+tan. a
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Step-by-step explanation:
√1+sina/1-sina
√(1+sina)/(1-sina)x√(1+sina)/(1+sina)
√(1+sina)²/(1-sin²a)
√(1+sina)²/cos²a
taking square root
(1+sina)/cos
(1/cosa + sina/cosa)
sec + tana.
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