Question

Without using tables or calculator,find the value of :
cos 900+1.

A 1
B 8
C 3
D2

Answer 1

Answer on Question#51817 – Math – Trigonometry

Question. Without using tables or calculator, find the value of $\cos 90{}^{\circ} + 1$.

A 1

B 8

C 3

D 2

Solution. Using the trigonometric circle we find that $\cos 90{}^{\circ} = 0$:

Hence $\cos 90{}^{\circ} + 1 = 0 + 1 = 1$.

Answer. A

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