2. ପ୍ରମାଣ କର :
sin(A-B)
COSA.cosB
i)
tanA - tanB,
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Answer:
sin(A-B))/cosAcosB = (sinAcosB - cosAsinB)) / cosAcosB =
sinAcosB/cosAcosb - cosAsinB/cosAcosB = sinA/cosA - sinBcosB = tanA - TanB
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