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Popular >

-2sin(30)

Solution

- 2 sin (3 0^{\circ})

Solution

- 1

Solution steps

- 2 sin (3 0^{\circ})

Use the following trivial identity:

sin (3 0^{\circ}) = \frac{1}{2}

sin (3 0^{\circ})

sin (x)

periodicity table with

36 0^{\circ} n

cycle:

x 0 3 0^{\circ} 4 5^{\circ} 6 0^{\circ} 9 0^{\circ} 12 0^{\circ} 13 5^{\circ} 15 0^{\circ} sin (x) 0 \frac{1}{2} \frac{2}{2} \frac{3}{2} 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} x 18 0^{\circ} 21 0^{\circ} 22 5^{\circ} 24 0^{\circ} 27 0^{\circ} 30 0^{\circ} 31 5^{\circ} 33 0^{\circ} sin (x) 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2}

= \frac{1}{2}

= - 2 \cdot \frac{1}{2}

Simplify

- 2 \cdot \frac{1}{2} : - 1

- 2 \cdot \frac{1}{2}

Convert element to fraction:

2 = \frac{2}{1}

= \frac{2}{1} \cdot \frac{1}{2}

Cross-cancel:

2

= - 1

= - 1

Popular Examples

cos (- 3)

sin(90)+cos(60)

sin (9 0^{\circ}) + cos (6 0^{\circ})

35tan(0)-15.022sec^2(0)+1

35 tan (0) - 15.022 sec^{2} (0) + 1

cos (arcsec (2))

0.05*cos(22.91*0.07)

0.05 \cdot cos (22.91 \cdot 0.07)

Frequently Asked Questions (FAQ)

What is the value of -2sin(30) ?
The value of -2sin(30) is -1