How do you find the exact functional value tan(45°+30°) using the cosine sum or difference identity?
1 Answer
Oct 16, 2015
Find exact value of tan (45 + 30).
Ans:
Explanation:
Find sin (45 + 30) and cos (45 + 30)
sin (45 + 30) = sin 45.cos 30 + sin 30.cos 45 =
cos (45 + 30) = cos 45.cos 30 - sin 45.sin 30 =
Check by calculator.
tan (45 + 30) = tan (75) = 3.73