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the co function of a sine.

Trigonometric co-function identities are relationships between the basic trigonometric functions (sine and cosine) based on complementary angles. They

how to scribe baseboard

Use a carpenter's level to measure the baseboards on uneven floors. You want the level to be straight. Cut at 45-degrees for bends, and 90-degrees for

Is π a real number or not?

Pi is an irrational number, which means that it is a real number that cannot be expressed by a simple fraction. That's because pi is what mathematicians

what is addy birthday

An address, especially an email address. 'I just sent you a note from my other addy' 'In the meantime, of course, anything on his wishlist ...