(please help) how to find tan 40° easily without calculator
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Answer:
tan(40) = 0.84(approx)
Step-by-step explanation:
Yes, You can find the value of tan 40 without using calculator.
You can use Maclaurin Series, to find the value.
tan(x) = x+(1/3)3+(2/15)x5+(17/315)x7+....
Here, x should be in radians.
Given:
Degree = 40 = 0.698 = 0.7 apprx (1 Degree = 0.0174533 Radians)
tan(40) = 0.7 +(1/3)(0.7)3+(2/15)(0.7)5+(17/315)(0.7)7+....
= 0.7 + 0.1143 + 0.0224 + 0.004
tan(40) = 0.84 approx
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