Question

TRIGNOMETRIC

formulae of reduction???????????​

Answer 1

Step-by-step explanation:

To find some integrals we can use the reduction formulas. These formulas enable us to reduce the degree of the integrand and calculate the integrals in a finite number of steps. Below are the reduction formulas for integrals involving the most common functions. ∫emxxndx= −emx(n−1)xn−1 +mn−1∫emxxn−1dx, n≠1.

Answer 2

Reduction Formula. Any trigonometric function whose argument is 90∘±θ, 180∘±θ, 270∘±θ and 360∘±θ (hence -θ) can be written simply in terms of θ. ... From this we may expect that sin(90∘+θ)=cosθ.