1. Given that sinh x fractional form. a. cosh x b. tanh x c. sech x d. coth x e. cosh 2x 7 = 25 find the values of the following, giving your answer in [7] 2. Prove from first principles (using the definitions of cosh x and sinh x) that cosh 2x = 2 cosh2 x - 1 3. Solve the following equations for x a. 4 sinh x = 1 2e-* b. 2 cosh x 6 sinhx + 7 = 0 - c. 3 cosh? x = 7 sinh x 1 d. 2 cosh 2x + 3 cosh x = 8 X 4. Show that sin(arctan x) = 14 and hence evaluate sin(arctan 3) 1+x2 5. Without using a calculator, determine cos(arcsin(-)) [6] [3] [5] [5] 2555 [5] [4]