Answer:
hi
Explanation:
cot ² X- COS X cot x- cos x B. D.
= cot x + cos x 2 cot x cot x 2 cos X cos X 2 cot x 2 cos X cot x- cos X 2 2 cot x cos X cot x- cos X cot x + cos x)( cot x + cos x)
= cot x cos X
= cot x + cos x)(cot x- cos x) cot x+cos X 2 cot x cot x 2 COS X COS X
= cot x + cos X (cot x + cos x)(cot x- cos x) cot x cos X
= cot x + cos X
= cot x + cos X
= cot x + cos x