Use right triangles to explain why cos'x + sin' x = π/2

How do you prove that cos pi 2 x Sinx?

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Let ABC be a triangle right-angled at B. Let AB be the base and AC the hypotenuse. If we denote the angle C by x, the base angle A = (π/2 - x) so that A + B + C = π/2 - x + π/2 + x =π or 180° . Now for the base angle A, BC is the perpendicular.

Step-by-step explanation:

x = -2

y = 848

step-by-step explanation:

plug in the numbers