prove :- tan 70=tan 20+2tan50
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tan 70 = tan(50+20)
=>tan 70= (tan 50 + tan20)/(1-tan50* tan20)
=>tan 70- tan 70*tan50*tan20 = tan 50 +tan20
=>tan 70- tan 50 =tan50+tan20 (Since, tan 70 * tan 20 =1)
=>tan 70 = 2tan50 +tan20
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=>tan 70= (tan 50 + tan20)/(1-tan50* tan20)
=>tan 70- tan 70*tan50*tan20 = tan 50 +tan20
=>tan 70- tan 50 =tan50+tan20 (Since, tan 70 * tan 20 =1)
=>tan 70 = 2tan50 +tan20
mark as brainlist
rahul444469:
thanks
Answered by
0
Answer:
tan 70 = 2tan50 +tan20
Step-by-step explanation:
tan 70 = tan(50+20)
tan 70= (tan 50 + tan20)/(1-tan50* tan20)
tan 70- tan 70*tan50*tan20 = tan 50 +tan20
tan 70- tan 50 =tan50+tan20 (Since, tan 70 * tan 20 =1)
tan 70 = 2tan50 +tan20
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