Datrys cos^230+sin^230

$$\cos ^ { 2 } 30 + \sin ^ { 2 } 30$$

Enrhifo

$$1$$

Camau Ateb

Cael gwerth \cos(30) o’r tabl gwerthoedd trigonometrig.

$$\left(\frac{\sqrt{3}}{2}\right)^{2}+\left(\sin(30)\right)^{2}$$

I godi \frac{\sqrt{3}}{2} i bŵer, codwch y rhifiadur a'r enwadur i bŵer ac yna rhannwch nhw.

$$\frac{\left(\sqrt{3}\right)^{2}}{2^{2}}+\left(\sin(30)\right)^{2}$$

Cael gwerth \sin(30) o’r tabl gwerthoedd trigonometrig.

$$\frac{\left(\sqrt{3}\right)^{2}}{2^{2}}+\left(\frac{1}{2}\right)^{2}$$

Cyfrifo \frac{1}{2} i bŵer 2 a chael \frac{1}{4}.

$$\frac{\left(\sqrt{3}\right)^{2}}{2^{2}}+\frac{1}{4}$$

I ychwanegu neu dynnu mynegiannau, rhaid i chi eu ehangu i wneud eu enwaduron yr un fath. Ehangu 2^{2}.

$$\frac{\left(\sqrt{3}\right)^{2}}{4}+\frac{1}{4}$$

Gan fod gan \frac{\left(\sqrt{3}\right)^{2}}{4} a \frac{1}{4} yr un dynodydd, adiwch nhw drwy adio eu rhifiaduron.

$$\frac{\left(\sqrt{3}\right)^{2}+1}{4}$$

Sgwâr \sqrt{3} yw 3.

$$\frac{3}{2^{2}}+\frac{1}{4}$$

Cyfrifo 2 i bŵer 2 a chael 4.

$$\frac{3}{4}+\frac{1}{4}$$

Adio \frac{3}{4} a \frac{1}{4} i gael 1.

$$1$$