Sine, Cos & Tan Graph Tricks for GCSE Maths

Q) The value of tan[1/2 cos^(−1) (√5/3)] is (a) (3+√5)/2 (b) (3−√5)/2(c) (−3+√g5)/2(d) (−3−√5)/2

Draw the graph of 𝑓(𝑥)=𝑠𝑖𝑛^(−1) 𝑥, 𝑥∈[−1/√2, 1/√2]. Also, write range of f(x). #trigonometry