Question

8. f
ad, Prove that:
tan 26°tan 23'tan 45º tan 67°tan 64°= 1.​

Answer 1

Answer:

tan(90-64)°tan (90-67)°tan25°tan67°tan64°

Step-by-step explanation:

=cot 64° cot 67°tan 67°tan64°=1

Answer 2

Cot(90-67) tan67 cot (90-64)tan64 tan45
1x1x1
1,,
Proved