Processing Math: Done

From Förberedande kurs i matematik 1

If we once again use the Pythagorean identity we get

cos2v+sin2v=1sinv=1−cos2v 

Because the angle v lies between 0 and , sin v is positive (an angle in the first and second quadrants has a positive y -coordinate) and therefore

sinv=+1−cos2v=1−b2