Find the value of:
tan 15 (degree) tan 30° tan 45° tan 60(degree) tan 75°
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4
Answer:
1
Step-by-step explanation:
tan15°×tan30°×tan45°×tan 60°×tan 75°
=cot(90°-15°)×cot(90°-30°)×tan45°×tan60° ×tan75°
=cot75°×cot60°×tan45°×tan60°×tan75°
=cot75°×tan75°×cot60°×tan60°×tan45°
=1×1×1
=1
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