tan 32 + tan 88 / 1- tan 32* tan 88
Answers
Answer:
tan(32+88)
tan(120)
tan(90+30)
-cot(30)
-√3
Step-by-step explanation:
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Answer:
(tan 32° + tan 88°) / (1- tan 32° × tan 88°) = -√3
Concept:
tan (A + B) is given by,
tan (A + B) = (tan A + tan B)/(1 - tanA tan B) ----------------------- (i)
Given:
(tan 32° + tan 88°) / (1- tan 32° × tan 88°)
Find:
The value of the given expression.
Solution:
Given that,
(tan 32° + tan 88°) / (1- tan 32° × tan 88°)
Comparing this with equation (i), we get
A = 32° and B = 88°
∴ (tan 32° + tan 88°) / (1- tan 32° × tan 88°) = tan (32° + 88°)
= tan (120°)
= tan 120°
= tan (180° - 60°)
But tan (180° - A) = - tan A
∴ (tan 32° + tan 88°) / (1- tan 32° × tan 88°) = - tan 60°
= - (√3) [∵ tan 60° = √3]
= -√3
Hence, (tan 32° + tan 88°) / (1- tan 32° × tan 88°) = -√3
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