You have to add it backwards and times it then you divde 2
1) Tan45 = 1
2) Sin70 = 0.9397
3) Cos30 = 0.8660
4) Cos20 = 0.9397
S is 25 years old
Hope that helps
Answer:
Step-by-step explanation:
Given
Required
Show that:
Divide through by a
The general form of a quadratic equation is:
By comparison, we have:
Sum is calculated as:
So, we have:
Divide both sides by -1
Similarly;
Product is calculated as:
So, we have:
The answer is irregular because speak is the base word and spoke is its past word