Aprēķins: ZWXTI2 - 1

1* tg(a)^² =

1

/ cos(a)^²

1* tg(a)^² =

1

/ cos(a)^²

$$1\cdot tg(a)^{2}$$ = $$\frac{1}{cos(a)^{2}}$$

1* tg(a)^²-

1

/ cos(a)^²

= 0$$1\cdot tg(a)^{2}-\frac{1}{cos(a)^{2}}$$ = $$0$$

sin(a)^²

/ cos(a)^²

-

1

/ cos(a)^²

= 0$$\frac{sin(a)^{2}}{cos(a)^{2}}-\frac{1}{cos(a)^{2}}$$ = $$0$$

a = -

π

/ 2

$$a$$ = $$-\frac{\pi}{2}$$

a = - 0.5* π

$$a$$ = $$-0.5\cdot \pi$$