Solve this: 1) sin(7 pi)(6)=? 2) cos(4 pi)(3)=? 3) tan(3 pi)(2)=? 4) cot(11 pi)(4)=?

podmitijuy0 2022-08-14 Answered
Solve this:
1 ) sin ( 7 π 6 ) = ? 2 ) cos ( 4 π 3 ) = ? 3 ) tan ( 3 π 2 ) = ? 4 ) cot ( 11 π 4 ) = ?
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Answers (2)

ambivalentnoe1
Answered 2022-08-15 Author has 20 answers
1) sin ( 7 π 6 ) = sin ( π + π 6 ) sin ( A + B ) = sin A cos B + cos A sin B = sin π cos π 6 + cos π sin ( π 6 ) = 0 ( 3 2 ) + ( 1 ) ( 1 2 ) = 1 2
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rivasguss9
Answered 2022-08-16 Author has 4 answers
2) cos ( 4 π 3 ) cos ( x ) = cos ( x ) cos ( 4 π 3 ) = cos ( π + π 3 ) cos ( A + B ) = cos A cos B sin A sin B = cos π cos π 3 sin π sin π 3 = ( 1 ) ( 1 2 ) 0 3 2 = 1 2
3) tan ( 3 π 2 ) = tan ( 2 + 1 2 π ) = tan ( π + π 2 ) tan ( x + π k ) = tan ( x ) tan ( π + π 2 ) = tan ( π 2 ) =
4) cot ( 11 π 4 ) = 1 tan ( 11 π 4 ) tan ( 11 π 4 ) = tan ( 8 + 3 4 π ) = tan ( 2 π + 3 4 π ) tan ( x + π k ) = tan ( x ) tan ( 2 π + 3 4 π ) = tan ( 3 4 π ) tan ( 3 π 4 ) = tan ( π 4 + π 2 ) = tan ( π 4 ) = 1
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