Convert the following degree measure into radian measure 240^o

Convert the following degree measure into radian measure -320^o

Find the degree measure corresponding to the following radian measure.  -3

Find the degree measure corresponding to the following radian measure.  \(\frac { 11\pi }{ 18 } \)

Evaluate \(\cot\left(\frac{-15\pi}{4}\right)\)

In any quadrilateral ABCD, prove that sin (A + B) + sin (C + D) = 0

Prove that \(\cos18^o-\sin18^o=\sqrt{2}.\sin27^o\)

If \(\tan^2x=2\tan^2\phi+1\), prove that \(\cos2x+sin^2\phi=0\)

Convert  \(\frac{1}{4}\) radians into degree

Find the quadrants in which the terminal sides of the following angles lie. -70^o

Express the following as sum or difference 2 cos3\(\theta\) cos\(\theta\)

Express the following as sum or difference 2 sin4\(\theta\) sin2\(\theta\)

Express the following as sum or difference cos\(\frac{3A}{2}cos\frac{5A}{2}\)

Express the following as sum or difference 2cos13Asin15A

Prove that \({ \cos }^{ -1 }\left( \frac { 4 }{ 5 } \right) +{ \cos }^{ -1 }\left( \frac { 3 }{ 5 } \right) ={ \cos }^{ -1 }\left( \frac { 27 }{ 11 } \right) \)