Question
give the exact real number value without using a calculator
sin[(cos^-1)(1/4)]
sin[(tan^-1)(3/4)+(tan^-1)(12/5)]
sin[(cos^-1)(1/4)]
sin[(tan^-1)(3/4)+(tan^-1)(12/5)]
Answers
bobpursley
On each of these, draw the triangle. On the first, the adjacent side is 1, the hyp is 4, so the opposite side is sqrt(16-1) So sine of that angle is sqrt15/4
Same idea on the next.
Same idea on the next.