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Recent questions tagged trigonometry & complex number
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If the complex number $A$ satisfies the equation $A(3-i) = 2 + i$, where $i = \sqrt{-1}$, what is the value of $A$.
sat
math
trigonometry & complex number
calculator
asked
Apr 1, 2019
by
priyanka.clay6
1
answer
If $\cos x = a$ where $\frac{\pi}{2} < x < \pi$, and $\cos y = -a$, then which of the following could be the value of $y$ ?
sat
math
trigonometry & complex number
calculator
asked
Apr 1, 2019
by
priyanka.clay6
1
answer
If $( \cos x) (\sin x) = 0.5$, what is the value of $(\cos x + \sin x)^2 $
sat
math
trigonometry & complex number
calculator
asked
Apr 1, 2019
by
priyanka.clay6
1
answer
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