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@Apu
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.question 7 both parts
I got the idea of theory of equations from the fact that that tan (a+b) uses both sum and product of roots
sorry it took a lot of time to reply back , i got the same answers but i believe u missed the sin(theta+phi) part and also u made a slight calc error in cos2theta+cos2phi part , check calc from b^2-a^2
also guide on how to develop your brain to think like this
@¹¹⁷sos
@¹¹⁷sos
I will redo the calculation and try to find and easier method wait
Use cosC + cosD for last part jisme se 2 cos(theta - phi)cos(theta+phi) hoga we already know cos(theta-phi) and use sin(theta+ phi) for cos
Any other easier approach ?
I found an easier approach for the first part
Can't think of one
Oh do tell
bsec theta= c-atantheta
square both side and replace sec^2theta with 1+tan^2theta to get complete equation in tan terms
then use sum of root and product of roots, the calc is much simpler than your approach
nicely done sos
we good @hardcoreisdead ?
I mean you did what I did, end me secant theta hi eliminate kerna hai
yeah but its about the calc
anyways imma close the thread now
thanxx
+solved @¹¹⁷sos
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