Question: Please show work thank you 11. Using a double-angle or half-angle formula to simplify the given expressions. (a) If 25in(26)cos(26') = sin(A) then A: (b)

Please show work thank you 11. Using a double-angle or half-angle

Please show work thank you

11. Using a double-angle or half-angle formula to simplify the given expressions. (a) If 25in(26)cos(26') = sin(A) then A: (b) If cos2 (7x) - sin2 (73:) = cos (3") then B

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