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43 votes
Find the exact values below. If applicable, click on "Undefined." OVO Л cos6752 Undefined -(-) - = 1 X ?

User Massisenergy
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1 Answer

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19 votes

In order to calculate the value of cos675°, consider that 675° = 315°.

Moreover, take into account that cos315° = -cos45°, then, you have:

-cos45° = √2/2

for tan(-7π/6), consider that tan(-7π/6) = tan(210°), moreover, cosnider tanx = sinx/cosx, then, you have:

tan(-210°) = sin(-210°)/cos(-210°) = -(1/2)/(√3/2) = -1/√3

User Rabin Utam
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