The value of $$ cot\ {π\over 20}\ cot{3π\over 20} \cot{5π\over20}\ cot{7π\over 20}\ cot {9π\over20}$$ is:

In the given figure AD ‖ BC, if ∠ABC=72°, then ∠BCD=?

If $$ {x+{1\over 16x}}=1 $$, then $$ {64x^{3}+{1\over 64x^{3}}}$$ will be:

A hardware device that converts data to full information?

Which part of a computer is used for calculation and comparison?

CPU's ALU consists of?

Which are the control, memory and third units in the CPU?

Which of the following is optical memory?