Answer:
see explanation
Step-by-step explanation:
Using the trigonometric identity
• 1 + cot²x = csc²x
Consider the left side
x -
x
Factorise as a difference of squares
= (csc²x - cot²x)(csc²x + cot²x)
= (1 + cot²x - cot²x)(csc²x + cot²x)
= csc²x + cot²x
= csc²x + csc²x - 1
= 2csc²x - 1 = right side ⇒ verified
Answer:
Step-by-step explanation:
9/I0 x 2/2 =9/I0
Or 0.9 in decimals
Answer:
8900
Step-by-step explanation:
25 * 89 /
= 25 * 89 * 4 = 100 * 89 = 8900