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Kumar Rajesh
Subject: Maths
, asked on 14/5/18
Prove that: Cos 570.sin 510+sin(-330)cos(-390)=0
Answer
1
Dibyasree Sanyal
Subject: Maths
, asked on 12/5/18
Q.1. sin A = k sin (A + B). Prove that:
$\mathrm{tan}\left(A+B\right)=\frac{\mathrm{sin}B}{\mathrm{cos}B-k}$
.
Answer
2
Shourya Mishra
Subject: Maths
, asked on 10/5/18
Can we write:
cos^2 (90-A)=sin^2 A
Answer
1
अर्कज
Subject: Maths
, asked on 8/5/18
Example 6. If cos x = - 3/5 , x lies in the third quadrant, find the values of other five trigonometric functions.
Answer
2
अर्कज
Subject: Maths
, asked on 8/5/18
Explain
Answer
1
अर्कज
Subject: Maths
, asked on 8/5/18
Explain
Answer
2
अर्कज
Subject: Maths
, asked on 8/5/18
Explain
Answer
1
अर्कज
Subject: Maths
, asked on 8/5/18
Explain
Answer
1
अर्कज
Subject: Maths
, asked on 8/5/18
Explain
Answer
1
अर्कज
Subject: Maths
, asked on 8/5/18
Explain
Answer
2
अर्कज
Subject: Maths
, asked on 8/5/18
Explain trigonometric functions
Answer
1
अर्कज
Subject: Maths
, asked on 7/5/18
A wheel makes 360 revolutions in one minute . through how many radians does it turn in one second?
Answer
1
अर्कज
Subject: Maths
, asked on 7/5/18
If the arc of the same length in two circles subtend angles 65 degree and 110 degree at the centre , find the ratio of their radii
Answer
1
अर्कज
Subject: Maths
, asked on 7/5/18
Find the radius of the circle in whuch a central angle of 60 degrees intercepts an arc of length 37.4 cm
Answer
1
Alexis Sanchez
Subject: Maths
, asked on 7/5/18
Example 19:
If
$\mathrm{tan}\beta =\frac{n\mathrm{sin}\alpha \mathrm{cos}\alpha}{1-n{\mathrm{sin}}^{2}\alpha}$
, show that
$\mathrm{tan}\left(\alpha -\beta \right)=\left(1-n\right)\mathrm{tan}\alpha $
Answer
1
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cos^2 (90-A)=sin^2 A

Example 19:If $\mathrm{tan}\beta =\frac{n\mathrm{sin}\alpha \mathrm{cos}\alpha}{1-n{\mathrm{sin}}^{2}\alpha}$, show that $\mathrm{tan}\left(\alpha -\beta \right)=\left(1-n\right)\mathrm{tan}\alpha $