- If cos a = 0 then sin (a - b) can be reduced to :
(A) cos B
(B) cos 2B
(C) sina
(D) sin 2a
[CBSE-20
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Answered by
2
Answer:
A) CosB
Step-by-step explanation:
CosA = 0
=> A = 90°
Sin(A-B) = SinACosB - CosASinB
= SIn90°CosB - Cos90°SinB
= CosB
Answered by
2
A)cosbB
step_by_stepexpkanation. cosA__0. __A_90. sin(a-b-sinacosb-cosasinb-sln90cosBA)cosB•
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