Theseformulas are used to shift the angles by π/2, π, 2π, etc. They are also called co-function identities. sin (π/2 - A) = cos A & cos (π/2 - A) = sin A; sin (π/2 + A) = cos A & cos (π/2 + A) = - sin A; sin (3π/2 - A) = - cos A & cos (3π/2 - A) = - sin A; sin (3π/2 + A) = - cos A & cos (3π/2 + A) = sin A

Ifthe period is more than 2π then B is a fraction; use the formula period = 2π/B to find the exact value. Find any phase shift, h. How To Determine The Equation Of A Sine And Cosine Graph? The general equation of a sine graph is y = A sin(B(x - D)) + C The general equation of a cosine graph is y = A cos(B(x - D)) + C.
CommonCore: High School - Geometry : Derive the formula A = 1/2 ab sin(C) for the area of a triangle by drawing an auxiliary line from a vertex perpendicular to the opposite side Study concepts, example questions & explanations for Common Core: High School - Geometry
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    • sin a sin b sin c formula