tan 4°.tan 43° . tan 47°. tan 86° का मान कितना होगा?
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Answer: the answer is 1
Step-by-step explanation: tan4 tan43 tan47 tan86= (sin4/cos4)(sin43/cos43)(sin47/cos47)(sin86/cos86) ------ change sin(90-a)= cos a and the terms will cancel out giving the answer 1
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