Ну скажите 1 метр это 100 сантиметров или 1000 вот так объясните ))

1метр = 100 сантиметров

1 метр=10дм     10дм=100см   1 метр=100см

cos(α+β)+2sinαsinβ=cosαcosβ−sinαsinβ+2sinαsinβ=

cosαcosβ+sinαsinβ=cos(α−β)

если \alpha -\beta=\piα−β=π , то cos(\alpha -\beta ) =cos\pi =-1.cos(α−β)=cosπ=−1.

б)

\frac{sin^{2}\alpha +sin(\pi-\alpha)cos (\frac{\pi }{2} -\alpha) }{tq(\pi+\alpha)ctq( \frac{3\pi }{2} -\alpha ) } = \frac{sin^{2}\alpha +sin\alpha*sin\alpha }{tq\alpha*tq\alpha } =\frac{2sin^{2} \alpha }{tq^{2} \alpha } =\frac{2sin^{2}\alpha }{\frac{sin^{2} \alpha }{cos^{2} \alpha } } =2cos^{2} \alpha .

tq(π+α)ctq(

2

3π

−α)

sin

2

α+sin(π−α)cos(

2

π

−α)

=

tqα∗tqα

sin

2

α+sinα∗sinα

=

tq

2

α

2sin

2

α

=

cos

2

α

sin

2

α

2sin

2

α

=2cos

2

α.

в)

cos7xcos6x+sin7xsin6x=cos(7x-6x)=cosx.cos7xcos6x+sin7xsin6x=cos(7x−6x)=cosx.

Пошаговое объяснение:

regular jogging reduces the stress on the joints of the lower limbs and reduces the risk of injury.



regular jogging reduces the stress on the joints of the lower limbs and reduces the risk of injury.



regular jogging reduces the stress on the joints of the lower limbs and reduces the risk of injury.



regular jogging reduces the stress on the joints of the lower limbs and reduces the risk of injury.



обычным бегом уменьшается нагрузка на суставы нижних конечностей и снижается риск травм. конечностей и снижает риск травм.