Question

iv) If cos (X+B) = 0, then sin (X-B) =
(a) cosB (b) cos2B (c) sinA (a) sin 2A
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Answer 1

⭐《ANSWER》

$\huge\mathfrak\pink {ANSWER}$

↪Actually welcome to the concept of the TRIGONOMERTRY

↪Basically here , we are solving the given data , as

↪since we know that ,

↪Sin ( 90 - @ ) = cos @

↪thus we get as ,

↪b.) Cos2B