Question

sinalpha+sin2alpha+sin 3alpha+sin 4alpha/cosalpha+cos2alpha+cos3alpha+cos4alpha=tan (5alpha/2) find the answer fast please ​

Answer 1

Answer:

Explanation:

sin

2

α

−

sin

4

α

=

cos

2

α

−

cos

4

α

let

sin

2

α

−

sin

4

α

=

k

sin

2

α

=

1

−

cos

2

α

sin

4

α

=

(

1

−

cos

2

α

)

2

=

1

−

2

cos

2

α

+

cos

4

α

k

=

1

−

cos

2

α

−

(

1

−

2

cos

2

α

+

cos

4

α

)

k

=

1

−

cos

2

α

−

1

+

2

cos

2

α

−

cos

4

α

k

=

cos

2

α

−

cos

4

α