Question

prove that 4 sin power 4 30 degrees -3 cos square 45 degrees- sin square 90 degrees =2​

Answer 1

Answer:

You start with the trig values for 30, 45, 60, and 90 degrees which you get ... for the sine of 15 degrees, you compute the square root of (0.5*(1+cos(30)). ... Practicing engineers and scientists just consulted those tables for the cosine of 1 degree. ... to are the formulae for [math]\sin(2\theta)[/math], [math]\cos(2\theta)[/math],