tan 10 tan 15 tan 75 tan 80
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0
Answer:
tan10×tan80×tan75×tan15
= tan(90-80) × tan80 ×tan(90-15) × tan15
= cot80× tan80 ×cot15 ×tan15
=1/tan80×tan80×1/tan15×tan15
= 1×1×1×1
= 1
Answered by
0
Answer:
1
Step-by-step explanation:
tan10. tan15. tan75. tan80
=tan10. tan80. tan15. tan75
=tan10.tan(90-10). tan15. tan(90-15)
=tan10. cot10. tan15. cot15
=tan10. 1/tan10. tan15. 1/tan15
=1.1
=1
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