if cos x = - 3/4,x lies in 2 quadrant , sinx/2, cosx/2, tanx/2
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Step-by-step explanation:
cosx/2=under root (cosx+1/2)
=1/root8
sinx/2=under root (1+cosx/2)
=under root(7/8)
tanx/2=root7/8
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