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Question 1. Asked on :10 October 2019:07:06:18 PM

#### Who is father of trignometry ?

-Added by Aarohi Chauhan Mathematics » Introduction To Trignometry

priyanshu kumar
Hipparchus.

-Answered by priyanshu kumar On 12 October 2019:04:12:31 PM

Question 2. Asked on :07 October 2019:11:23:47 AM

#### Prove CosA1+sinA+1+sinAcosA=2secA

-Added by Himanshi Verma Mathematics » Introduction To Trignometry

Himanshi Verma
LHS =cosA/(1+sinA) +(1+sinA)/cosA
={cos²A +(1+sinA)²}/cosA.(1+sinA)
={cos²A+1+sin²A+2sinA}/cosA.(1+sinA)
use sin²∅ +cos²∅ =1
=(1+1+2sinA)/cosA(1+sinA)
=2(1+sinA)/cosA(1+sinA)
=2/cosA
=2secA = RHS

-Answered by Himanshi Verma On 07 October 2019:11:28:21 AM

Question 3. Asked on :07 October 2019:11:16:08 AM

#### Find the value of (sin°45- cos°45)

-Added by Himanshi Verma Mathematics » Introduction To Trignometry

Master Purushottam
Sin 45°=1/√2
cos 45°=1/√2

Sin 45 + cos 45=
1/√2+1/√2=
2/√2=
2√2/2=
√2

-Answered by Master Purushottam On 07 October 2019:08:49:05 PM

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