Prove that sin(90-A) cos(90-A) = tanA / 1 + tan²A - Maths
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Prove that sin(90-A) cos(90-A) = tanA / 1 + tan²A - Maths - Trigonometric Functions
SOLVED: If cos A = 8, prove that sec(4A) = sec A - 1/4.
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SOLVED: If cos A = 8, prove that sec(4A) = sec A - 1/4.
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