Question:
Question 4: tan 5degrees X tan 30degrees X 4 tan 85degrees is equal to
Answer:
Given,
tan 5 * tan 30 * 4tan 85
= tan 5 * tan 30 * 4tan (90 -5)
= tan 5 * tan 30 * 4cot 5
= tan 5 * tan 30 * 4/tan 5
= 4*tan 30
= 4* 1/√3
= 4/√3
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