a) cos(17pi/6) and b) tan(15pi/4) Use the opposite angle identities and or periodicity identities to evaluate the following.

moidu13x8

moidu13x8

Answered question

2022-09-02

a) cos ( 17 π / 6 ) and b) tan ( 15 π / 4 )
Use the opposite angle identities and or periodicity identities to evaluate the following.

Answer & Explanation

Aleah Harrell

Aleah Harrell

Beginner2022-09-03Added 18 answers

cos 17 π / 6 = cos ( 18 π π ) / 6 = cos ( 3 π π / 6 ) = cos ( 2 π + π π / 6 ) = cos ( π π / 6 ) = cos π / 6 = 3 / 2
tan 15 π / 4 = tan ( 16 π π ) / 4 = tan ( 4 π π / 4 ) = tan ( π / 4 ) = tan π / 4 = 1

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