28 question and 29 question plz solve this two. I am preparating this for my sa 1 exam plz help me bro

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28.p² - q² = (sec² a - tan² a) / cosec² bAs sec² a - tan² a = 1 (identity):p² - q² = 1 / cosec² bThis implies that:(p² - q²) * sec² a = sec² a / cosec² a which is again p²29.Expanding the given expression:-> sin a - cos a + cot a sin a - cot a cos a + tan a sin a - tan a cos a-> sin a - cos a + (cos a/sina) sin a - (cos a/sina) cos a + (sin a/cos a) sin a - (sin a/cos a) cos a-> sin a - cos a + cos a - (cos² a / sin a) + (sin²a / cos a) - sin a-> (sin²a / cos a) - (cos² a / sin a) -> (sec a / cosec² a) - ( cosec a / sec² a)

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28 question and 29 question plz solve this two. I am preparating this for my sa 1 exam plz help me bro

28 question and 29 question plz solve this two. I am preparating this for my sa 1 exam plz help me bro

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