Please clear my confusion about find value of tan7.5 °.

Question

Sagar Gupta · Answer

What`s your confusion with tan7.5° .Kindly elaborate that where you have stuck?.If you will elaborate then I can help you better.

ANKIT ANAND · Answer

Yaa... tan15°=2tan7.5°∕1-tan²7.5° ⇒2-√3=2tan7.5°/1-tan²7.5° . By solving this eq i got value of tan7.5°= (√2-1)(2+√3) . But Ans is (√3-√2)(√2-1). How?

Umakant biswal · Answer

@ ankit
u have to apply the following formula
sin ( a/2 ) = [(1-cosa)/2] ^ ½
cos a/2 = [(1+cosa)/2] ^ ½
tan 2a = [2 tan a ] / [1+tan square (a) ]
answer is = root6-root3 +(root 2 ) -2
HOPE IT CLEARS YOUR DOUBT
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Please clear my confusion about find value of tan7.5 °.

Please clear my confusion about find value of tan7.5°.

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