Using a Calculator (Leaving Cert Mathematics): Quizzes

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Using a Calculator
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What must you press to access sin⁡−1\sin^{-1} on your calculator?

SHIFT then sin

How many minutes are in one degree?

60 minutes

What is 34°30′34°30' in decimal degrees?

34.5°34.5°

Which key finds the sine ratio of an angle?

sin

What mode should your calculator be in for trig problems?

Degree mode

When should you round your answer in trig calculations?

Only the final answer

If tan⁡B=1.2734\tan B = 1.2734, what key sequence finds angle BB?

SHIFT tan 1.2734 =

To enter 72°18′72°18', what key helps input degrees & mins?

°/'" key

What is cos⁡72°18′\cos 72°18' to 4 decimal places?

0.30400.3040

What does sin⁡−1\sin^{-1} find?

An angle from a sine ratio

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