Excel has built-in functions for sine and cosine, the two core trigonometric functions, and for hyperbolic sine and hyperbolic cosine, their hyperbolic counterparts. It also has built-in functions ...

Sine, cosine and tangent are the principle trigonometric functions. (Image credit: YuryZap | Shutterstock ) Trigonometry is a branch of mathematics that studies relationships between the sides and ...

Strategy 1: Convert everything to Sine and Cosine When faced with a complex trigonometric expression, your first move should be converting all functions to sine and cosine.

Both the sine and cosine functions have outputs between -1 and 1 (because the x and y values can be negative). You can think of these trig functions as a sort of "lookup table." ...

Interestingly enough, the trigonometric functions that define those relationships are also closely tied to circles. ... Next, think about the relationship between sine, cosine and the circle.

The first identity is the foundation of trigonometry, representing the relationship between sine and cosine on the unit circle. The other two identities are derived by cleverly manipulating this ...