Question

Qfind the values of the following:
1. (2π -x)
2.cosec²(3π/2-x)
3.(cos750°+cosec330°)​

Answer 1

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Answer 2

$(1)(2π -x)$

$= (2 \times \frac{22}{7} - x)$

$= \frac{44}{7} - x$

$= - x + \frac{44}{7}$

$= - x + 2 \pi$

$(3) \: ( \cos750°+ \cosec330°)$

$\small{ = \cos(750° )= \frac{ \sqrt{3} }{2} + \cosec(330°) = - 2}$

$\small { = \csc(330 \degree )=-\csc(360 \degree-30 \degree)=- \csc(30 \degree)=-2}$

$= ( \frac{ \sqrt{3} }{2} )+ ( - 2)$