Предмет: Геометрия, автор: SASHASHAPOVALOVA1999

У циліндрі паралельно його осі проведено переріз, який перетинає його нижню основу по хорді, що стягує дугу, градусна міра якої дорівнює а, 0° < а < 180°. Відрізок, який сполучає центр верхньої основи та середину цієї хорди, дорівнює d і утворює з площиною основи кут В. Знайдіть площу перерізу.

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Автор ответа: lvv9136

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