Question

1. Calcular:
a) Sen 98°
b) Sen 7°

Answer 1

Respuesta:

Explicación paso a paso:

sen(98)=sen(90+8)

=sen(90).cos(8)+cos(90).sen(8)

=1x$\frac{7}{5 \sqrt{2} }$+0x$\frac{1}{5 \sqrt{2} }$

=$\frac{7}{5 \sqrt{2} }$

sen(7)=sen(37-30)

=sen(37).cos(30)-cos(37).sen(30)

=$\frac{3}{5}$x$\frac{\sqrt{3} }{2}$-$\frac{4}{5}$x$\frac{1}{2}$

=$\frac{3\sqrt{3} }{10}$-$\frac{4}{10}$

=$\frac{3\sqrt{3}-4 }{10}$

Answer 2

Explicación paso a paso:

sen(98)=sen(90+8)

=sen(90).cos(8)+cos(90).sen(8)

=1x+0x

=

sen(7)=sen(37-30)

=sen(37).cos(30)-cos(37).sen(30)

=x-x

=-

=