Question

show that tan48 tan23 tan 42 tan 67 sin90 = 1​

Answer 1

Step-by-step explanation:

Primary carbons, are carbons attached to one other carbon. (Hydrogens – although usually 3 in number in this case – are ignored in this terminology, as we shall see). Secondary carbons are attached to two other carbons. Tertiary carbons are attached to three other carbons.

Answer 2

Answer:

tan42=cot48

and

tan23=cot67

and

sin90 =1

all terms will cancel out and remain will be 1