Question

.
The value of sin (180° +c). sin
(180°-c).cosec 2 c ?​

Answer 1

Answer:

Step-by-step explanation:

We can write, sin 180 as;

Sin 180 = Sin (90+90)

Since, sin (90+a) = cos a

So, sin (90+90) = cos 90

As we know cos 90 = 0, therefore,

Sin 180 = 0

Answer 2

we can write sin 180

sin 180 =sin (90+90)

since sin (90+90) =90

so sin (90+90) case =90

As we know case 90= 0 therefore

since 180 =0