Question

Sin ( 90 - Φ ) what is it explain properly​

Answer 1

Answer:

For angles less than a right angle, trigonometric functions are commonly defined as the ratio of two sides of a right triangle containing the angle and their

Answer 2

Patterns of right triangles. All triangles have 3 angles that add to 180 degrees. Therefore, if one angle is 90 degrees we can figure out Sin Theta = Cos (90 - Theta) and Cos Theta = Sin (90 - Theta).

Hope it's helpful to you