Mathematics
Calculate the value of A, if :
(sin A - 1) (2 cos A - 1) = 0
Trigonometric Identities
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Answer
(sin A - 1) (2 cos A - 1) = 0
⇒ (sin A - 1) = 0 and (2 cos A - 1) = 0
⇒ sin A = 1 and cos A =
⇒ sin A = sin 90° and cos A = cos 60°
Hence, A = 90° and 60°.
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