Prove $\cos \left( x - \frac { \pi } { 2 } \right) + \cos \left( x + \frac { \pi } { 2 } \right) = 0$

question 29

Essay

Prove $\cos \left( x - \frac { \pi } { 2 } \right) + \cos \left( x + \frac { \pi } { 2 } \right) = 0$ .

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Definitions:

Cross Section

A diagram or model that shows a vertical slice through structures or materials, revealing internal features.

Oceanic Plateau

Large, elevated areas of the seafloor, characterized by thick crusts and often formed by volcanic activity or mantle plumes.

Seafloor Spreading

The process by which new oceanic crust is formed at mid-ocean ridges and slowly moves away from the ridge, creating new seafloor.

Impact Crater

A depression on the surface of a planet, moon, or asteroid, created by the collision of a meteorite or comet.