1 markPaper 1 · Multiple choiceSolving Simple Trigonometric Equations

CSEC Additional Mathematics · May/June 2017 · Paper 1 · Question Q33

If \sin(x + 20^\circ) = \cos x, then the value of x is

(A)35^\circ
(B)45^\circ
(C)55^\circ
(D)70^\circ

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