Find the exact value of expression. sin ⁡ ( 30 ) − cos ⁡ (...

Lexi Mcneil

Lexi Mcneil

Answered

2022-07-26

Find the exact value of expression.
sin ( 30 ) cos ( 45 )

Answer & Explanation

cindysnifflesuz

cindysnifflesuz

Expert

2022-07-27Added 19 answers

sin ( 30 ) = 1 / 2
cos ( 45 ) = 2 / 2
Therefore the answer is ( 1 2 ) / 2
The values for sin ( 30 ) and cos ( 45 ) should be memorized, among others, using the trigonometric circle
Parker Bird

Parker Bird

Expert

2022-07-28Added 2 answers

sin 30 cos 45 = 1 2  2 2 = 1 2 2

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