It is known that → a = (COSA, Sina), → B = (CoSb, SINB), 0 is less than B, less than a, less than Pai (1) If | → a - → B | = radical 2, prove: → a perpendicular to the foot → B. (2) let → C = (0,1), if → a + → B = → C, find the value of a and B

It is known that → a = (COSA, Sina), → B = (CoSb, SINB), 0 is less than B, less than a, less than Pai (1) If | → a - → B | = radical 2, prove: → a perpendicular to the foot → B. (2) let → C = (0,1), if → a + → B = → C, find the value of a and B

Given → a = (COSA, Sina), → B = (CoSb, SINB), 0 < B < a < π (1) if | → a - → B | = √ 2, prove: → a ⊥ → B. (2) let → C = (0,1), if → a + → B = → C, find the value of a and B. (1) ∵ → a - → B = (COSA CoSb, sina SINB) |; | → a - → B | = √ [(COSA CoSb) &# 178; + (Sina -