Mathematics Practice Test – Trigonometrical Ratios of Angles (Questions with Answers and Explanations)

If Tan x =  , find Cos x – Sin x, such that 0^o < x < 90^o (WASSCE 1999)

A.       B.        C.         D.

Given that Cos x = 0.7431, 0^o < x < 90^o, find the value of 2 Sin x. (WASSCE 2000)

A. 0.74^o      B. 42.0^o      C. 1.34^o      D. 0.34^o

Given that Sin (A + B) = Sin A Cos B + Cos A Sin B, without using mathematical tables, evaluate Sin 105^o, leaving your answer in surd form. (NB: You may use 105^o = 60^o + 45^o)  

A.     B.     C.     D.