Trigonometry> Please clear my confusion about find valu...

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

ANKIT ANAND , 9 Years ago

Grade 12th pass

3 Answers

Sagar Gupta

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

Last Activity: 9 Years ago

ANKIT ANAND

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?

Last Activity: 9 Years ago

Umakant biswal

@ 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
ALL THE BEST ..

Last Activity: 9 Years ago