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tan 75 degree -tan15 degree

tan 75 degree -tan15 degree

Grade:11

2 Answers

jitender lakhanpal
62 Points
8 years ago

hi prince

change tan in sin and cos

in numerator you will get sin (75 - 15 )

and in denominator will be of form cos A * cosB

apply the formula the answer in sin 60 and sin 90 form

 

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Himanshu Mohan
40 Points
8 years ago
tan75-tan15 cot15-tan15 tan(90-A)=cotA cos15/sin15-sin15/cos15 (cos^2(15)-sin^2(15))/cos15*sin15 2cos30/sin30 2*cot30=2(3)^1/2 or 2sqrt3

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